Ophir is referred to in the Bible as a source of gold, silver, precious stones and exotic animals. King Solomon was reputed to have received a cargo of such goodies every three years, a detail which points to Ophir being a considerable distance from Israel.
The exact location of Ophir is the subject of continuing controversy. In broad terms the most popular regions suggested are, or have been, India(g) , Africa(f) and the Americas(a) , but they were not the only proposed locations, even Australia and the Solomon Islands were considered. Emilio Spedicato has opted for Tibet, where an ancient goldmine fits the bill, which he outlines in his paper entitled Ophir, It’s Location Unveiled.
There is also a claim that the Batanes Islands off the Northern Philippines held the site of Ophir(b) . Further west, Dhani Irwanto has claimed that Punt was also known as Ophir(d) and was situated on Sumatera (Sumatra) in Indonesia(c) . However, he went further and also located Atlantis in Indonesia in his book, Atlantis: The lost city is in Java Sea . His chosen site is just north of Bawean Island in the Java Sea.
However, Irwanto was not the first to link Atlantis with Ophir, Theodore L. Urban was the author of a paper delivered to the Lancaster County Historical Society of Pennsylvania in 1897. In it, he denied that Atlantis had been completely destroyed and argued that the biblical Ophir was in fact Atlantis, suggesting that it had been located in the Americas, which explained the three years that the round trip took(e).
Landbridges, in the distant past are believed to have played a critical part in early human migration. Similarly, landbridges,both real and speculative are important components in many Atlantis theories. There is no doubt that the ending of the last Ice Age and the consequent rising sea levels led to the creation of islands where continuous land has previously existed. The separation of Ireland and Britain from each other and from mainland Europe is just one example, the latter leading to a number of writers to identify ‘Doggerland‘, which lay between Britain and Denmark as the home of Atlantis.
The two most discussed landbridges were at the Bering Strait, where it is thought that it provided the gateway for humans to enter the Americas from Asia and an Atlantic landbridge, which was very popular at the end of the 19th and beginning of the 20th centuries>and even as late as the 1970s was espoused by Rene Malaise(a),<but is now completely abandoned. Although there was only one suggestion that the Bering Strait was in any way connected with Plato’s Atlantis, an Atlantic landbridge was seized upon by many leading scientists of the day as an explanation for the similarity of flora and fauna on both sides of the Atlantic, which was reinforced by the discovery of the Mid-Atlantic Ridge around the same time.
A number of landbridges have been proposed for the Mediterranean and linked to a variety of Atlantis theories, the most notable being proposed for the straits of Gibraltar, Sicily and Messina. Less popular theories have been constructed involving landbridges in locations, such as the Caribbean and Indonesia.
>(a) Atlantis, Vol.27, No.1, Jan-Feb 1974.<
Punt is the name given to a land with which the ancient Egyptians traded. The leading theory is that it was located to the southeast of Egypt, roughly occupying what is now called ‘the Horn of Africa, although there is also a popular view that it was situated on the Arabian Peninsula. Others suggest that a combination of parts of both regions might be nearer the truth. An article of November 2016 elaborates on the claim for this identification(e).
In 2013, a short book by Ahmed Ibrahim Awale, placed Punt in the same region, namely, in Hargeisa, the capital of Somaliland. A favourable and well illustrated review(f) of Awale’s book is worth a read.
Frank Joseph in his Atlantis Encyclopedia[0104.37] claims that “the Lands of Punt (are) often associated with the islands of Atlantis.” Joseph expands on this in an Atlantis Rising article(a) where he refers to an ancient Egyptian story of “The Shipwrecked Sailor” in which the ‘Serpent King’ is identified as master of the island of Punt, which again Joseph claims to be Atlantis.
More recently, a small number commentators have identified Punt/Atlantis with Indonesia(b)(c). Dhani Irwanto, who is a leading advocate of an Indonesian Atlantis published in November, 2015 an extensive article online(d) in which he specifically names the Indonesian island of Sumatera (Sumatra) as the land of Punt. He has now expanded this into a book, Land of Punt: In Search of the Divine Land of the Egyptians . Irwanto goes further and also identifies the mysterious land of Ophir in the Bible as Punt.
(a) See: Archive 2790
Dhani Irwanto (1962- ) is an Indonesian hydraulic engineer, who is the latest proponent of the Sundaland location for Atlantis, in his April 2015 book, Atlantis: The lost city is in Java Sea. A review of his book online(a), shows quite clearly that the author has made a serious effort to match Plato’s narrative with his chosen location for Atlantis, namely off the southern coast of the island of Kalimantan in the Java Sea. Irwanto also uses his professional expertise to analyse Plato’s many references to the waterways of the Atlantean capital and it extensive plain. The review also includes a number of maps and video clips used to support Irwanto’s views.
Irwanto has also adopted(c) the 32-point checklist of dos Santos and expanded it to 60 points.(d)
Irwanto also claims that the biblical Garden of Eden and the legendary island of Taprobane were situated on the island of Kilimantan. In an extensive online(b) article in November 2015, he identified the Indonesian island of Sumatra as the land of Punt, >which he thinks was also known as the Ophir referred to in the Old Testament (1 Kings 9.26 & 10.11).<
In June 2017, Irwanto published an illustrated paper(e) on Aurea Chersonesus, referred to by Ptolemy in his 2nd century Geographia . Irwanto has matched details in Ptolemy’s description with a place in western Sumatra called Tanjungemas renowned for its gold mines in the ancient times.
Gunung Padang is a megalithic site on the Indonesian island of Java, which was first surveyed in 1914 by the Dutch colonial authorities and published as Rapporten van de Oudheidkundige Dienst (Report of the Department of Antiquities). A post-war Australian investigation concluded that the site was much older than previously believed. Now, with presidential support, local archaeologists are carrying out an extensive investigation of the site.
The site has recently been claimed as part of Atlantis. A few years ago the late Arysio dos Santos was the leading proponent of Sundaland, which included Indonesia, as Atlantis. Now Danny Hilman Natawidjaja an Indonesian geologist has made a similar claim in his Kindle ebook, Plato Never Lied: Atlantis Is in Indonesia. In it Gunung Padang plays an important role. Mount Padang has also been claimed as the world’s oldest pyramid!
Nevertheless, a recent (May 2017) assault on Natawidjaja’s theories in an open letter(i) from Rebecca Bradley has laid bare the weaknesses in his claims.
Andrew Collins has now added an article(h). to his website that examines the preliminary claim that the lower levels at the site could be 12,000 years older than Gobekli Tepe. If confirmed, it will undoubtedly require some rewriting of history books. Do not lose sight of the fact that radiocarbon dating has limitations, being accurate for up to around 6,000 years with increasing unreliability up to perhaps 50,000 BC after which it is generally useless.
We now (Nov. ’14) have a report(e) that some type of ‘electrical device’ has been discovered at the site ‘made out of gold and copper and seems to resemble a primitive electrical capacitator.’ Until further information is available this claim must be treated with caution.
There are, however, dissenting voices as reported by journalist, Michael Bachelard(g), such as vulcanologist Sutikno Bronto, who says “Gunung Padang is simply the neck of a nearby volcano, not an ancient pyramid.Danny Hilman is not a vulcanologist. I am.” As for the carbon-dated cement between the stones, on which Hilman relies for his claims about the age of the site, Sutikno believes it is simply the byproduct of a natural weathering process, ”not man-made”. Other sceptics are even tougher. One archaeologist, who does not wish to be named since the President took such an interest, says the presidential taskforce is deluding itself. ”In the Pawon cave in Padalarang [about 45 kilometres from Gunung Padang], we found some human bones and tools made of bones about 9500 years ago, or about 7000 BCE. So, if at 7000 BCE our technology was only producing tools of bones, how can people from 20,000 BCE obtain the technology to build a pyramid?” the archaeologist asks.
Danny Hilman Natawidjaja is an Indonesian geologist who is no stranger to media interest, as he is regularly wheeled out for comment after the all-too-frequent earthquakes and volcanic eruptions in his country.
In 2013 he garnered further attention with two dramatic claims. The first was a declaration that the huge megalithic site at Gunung Padang on Java was also home to the oldest pyramid in the world(a). Not content with that, he has also stated that the same site is evidence for Atlantis in Indonesia(b). Apart from the media attention he also received support from the Indonesian president. Graham Hancock and Robert Schoch have both visited the site along with Danny Hilman(c).
Natawidjaja published his Atlantis theory in a Kindle ebook, Plato Never Lied: Atlantis Is in Indonesia.
November 2016 saw a further incredible claim coming from Natawidjaja, namely that a 2500-year-old ‘electrical device’ had been found on Gunung Padang, which is claimed to be some form of capacitor and has been compared with the design of the biblical Ark of the Covenant. The report(d) that I’ve seen does not include any images, but until more concrete information is available, my scepticism is on ‘red alert’.
In May 2017, Rebecca Bradley, in an open letter, wrote(e) an extensive attack on Natawidjaja’s Gunung Padang claims.
Tripura is the name of a triple city in Hindu mythology that was famed for its architecture and rich adornments. Its inhabitants are reputed to have become greedy over time and were destroyed by Shiva (Mahabharata, Bk7, Drona Parva, Sec.XI). The story is almost the same as that of Atlantis and its demise. Since 1997 until his death in 2005 the late Arysio Nunes dos Santos has championed the idea that Plato’s Atlantis narrative regarding a submerged civilisation had been borrowed from the east. He also linked Atlantis with Tripura(a).
2005 not only saw the death of dos Santos shortly after the publication of his theory in book form, while in Moscow, Sergey Teleguin had his book, Anatomy of a Myth, published in Russian, in which he also identified Tripura with Atlantis. An English translation of part of his book has now been provided by Teleguin(c).
R. Cedric Leonard has also linked Atlantis with Tripura, the capital of the island of Atala(b). However, Leonard has chosen the Azores as the most likely location for Atlantis and dos Santos opted for Sundaland, a large landmass, now partly submerged encompassing, among others, Thailand, the Philippines and Indonesia!
Scylla and Charybidis were a sea monster and a whirlpool in Greek mythology who according to Homer and other writers were located opposite each other across a narrow strait. This led to the idiomatic phrase “between Scylla and Charybidis” similar to our more modern phrase of being “between the devil and the deep blue sea” describing being caught between two opposing forces.
Many, such as Heinrich Schliemann, assume the original to have been located between Sicily and the Italian mainland at the strait of Messina. Arthur R. Weir in a 1959 article(d) refers to ancient documents, which state that Scylla and Charybdis lie between the Pillars of Hercules(c) .
A minority have opted for the Scylla being Calpe (The Rock of Gibraltar) and Charybdis being Mt. Abyla across the strait in North Africa or in other words the Pillars of Heracles(a) . However, Professor Arysio Santos promoting his Atlantis in Indonesia theory suggested that the ‘original’ Pillars of Heracles were in at Sunda Strait and later brought to ancient Greece where it was included by Homer in his Odysseus as Scylla and Charybdis!(b)
>Anatoly Zolotukhin has proposed that Scylla & Charybdis has been situated in the Bosporus near the Pillars of Heracles, while he located Atlantis itself in Crimea near Evpatoria(e).<
Writers who have located the wanderings of Ulysses in the North Atlantic have gone further afield in their search for Scylla and Charybdis with the west coast of Scotland (Pillot and Nyland), the Orkneys (Sora) southwest Cornwall near the Scilly Isles (Wilkens) .
(d) Atlantis – A New Theory, Science Fantasy #35, June 1959 pp 89-96
Diffusion is the anthropological term used to describe how similar customs, beliefs and artefact designs are spread between cultures through migration, invasion or trade. Diffusion is not just a ‘one-way street’ as history has shown that ideas have travelled in all directions, while in fact most ancient civilisations can be demonstrated to have absorbed cultural elements from a multiplicity of foreign societies. Today, globalisation has increased exponentially the variety of influences that all societies now experience. Not only is the number of these influences greater but the rate of increase is apparently accelerating. The ubiquity of Coca-Cola, T-shirts, Irish pubs, Japanese cameras, German cars, English language, Guinness, Chinese toys, ABBA, AK-47s etc., etc., etc., are indicative of the global reach of commercial ‘empires’ today. In older civilisations trade was more concerned with commodities such as metals, olive oil, wine, amber, obsidian, or timber, so the technologies involved in their production or exploitation were also exchanged.
The development of agriculture also saw techniques spread, which had to be modified to suit different climates, although recent studies indicate that agriculture started around the same time in a number of centres(I).
in the Fertile Crescent as far north as the Zagros Mountains. Further north, on the steppes of Russia, horses were domesticated and apparently there also the use of chariots originated. A book by David W. Anthony also attributes the region with being the source of what is known as the Proto-Indo-European family of languages.
Societal concepts, religious or legal were no different as their geographical spread can also be traced over time. Consider the different strands of the Abrahamic faiths, beginning with Judaism, which spawned Christianity and later was joined by Islam through Muhammad, who claimed to be a descendant of Abraham. Similarly, democracy has slowly evolved and spread over time and still has a long way to go.
Since early man left Africa, he has had ample time to settle all over our planet and exploit it resources, moving from being a hunter-gatherer to becoming a settled farmer, developing urban centres (city states), then empires and the inevitable wars. Wars, then like today, led to the develop of new technologies, chariots, longbows, armour, to be copied and if possible improved upon, by each side.
My view is that initially, technology and techniques were freely exchanged between peoples, until gradually the idea of monopoly entered the human psyche, eventually leading to the paranoia and greed associated with the ownership of ‘intellectual property’ today. I would speculate that a freer and possibly gentler diffusion of ideas lasted until, at the earliest, the first millennium BC.
In 2014, the University of Connecticut published the result of studies which demonstrated that human technological innovation occurred intermittently throughout the Old World, rather than spreading from a single point of origin, as previously thought(j).
Egerton Sykes, a leading 20th century Atlantologist, was a committed diffusionist, describing it as “the lifeblood of civilisation”(h).
A more extreme view is the concept of ‘hyperdiffusion’, which is the idea that there was a single ‘mother-culture’ which led to the development of all major civilisations. Ignatius Donnelly was a hyperdiffusionist, advocating Atlantis as the mother culture. His ‘heretical’ views were highlighted by the range of similarities between structures around the world in apparently unrelated cultures, which seem to greatly exceed what could be expected by mere coincidence alone. This is explored further in a recent illustrated article on the Malagabay website(v).
Similarly James Churchward proposed his invention, Mu, as an alternative hyperdiffusion centre. Perhaps better known is the work of W. J. Perry who was convinced  that an archaic civilisation had begun in Egypt and gradually spread eastward through Asia and Polynesia, eventually reaching the Americas. Ben Urish published a paper(d) in 1986 that offers a critical overview of hyperdiffusion.
Konrad Kulczyk promotes a hyperdiffusionist theory that places his proto-civilisation, New Atlantis, just south of the Aral Sea(e).
Ivar Zapp proposes a global seafaring civilisation thousands of years before the Greeks, Egyptians or Sumerians(k) in an as yet unpublished book, Babel Deciphered.
Hyperdiffusion is clearly a seductive theory having attracted the attention of researchers such as Richard Cassaro, who has produced an impressive collection of visual cultural similarities between ancient Egypt and pre-Columbian America(a). While the idea is not new, Cassaro’s images highlight the concept of diffusion very effectively, although he has, in my opinion overinterpreted the evidence in order to support hyperdiffusion.
Cassaro published The Missing Link in 2016 in which he expands on the widespread distribution of what he refers to as the ‘godself icon’. Although he clearly demonstrates that the motif has an extensive geographical spread it is equally obvious that the appearance of the icon is spread over a vast period of time apparently coinciding with the emergence of civilisation in different places at very different times, which, in my view, is not fully compatible with the concept of hyperdiffusion, as I would have expected a ‘mother-culture’, if such existed, to have spread its global influence far more rapidly.
A comparable discovery has been made by Ozgür Baris Etli, who has drawn attention(o) to carved hands at Göbekli Tepe that have counterparts in many other parts of the world where hands meeting at the navel are similarly depicted. I recently came across an image of(q) a megalithic statue in the Indonesian Bada Valley(u) showing its hands in a similar position.
Having mentioned Indonesia, I must draw your attention to a recent book by Dhani Irwanto, entitled Sundaland: Tracing the Cradle of Civilizations (1618), in which he makes a strong case for considering his native land as an ancient diffusionist centre, which experienced waves of emigration at the end of the Younger Dry as period that influenced the great civilisations of the Indus Valley, Egypt and Greece. Irwanto also claims that their cultural impact included the transference of the story of Atlantis from its original home in Sundaland.
Equally intriguing is the ‘Three Hares’ motif, found across Europe, the Middle East and as far as China(p) and now the subject of a book by Greeves, Andrew & Chapman. Another stylised symbol is that of the rosette found in the Mediterranean and spread as far as India(r)(s).
In a similar vein Jim Allen has devoted chapter three of his latest book to outlining what he entitled Bolivia and the Sumerian Connection(b). Arguably even more impressive is the array of images presented by Allen(c) suggesting that the civilisations of America were greatly influenced by ancient cultures in both east and west. It is obvious that a number of artifacts can be developed independently, but at some point the number of similar items produced by two separate cultures can exceed the number that can be reasonably put down to coincidence. The number of similarities presented by Allen alone clearly exceeds that threshold, demonstrating that the Americas were influenced by different sources, ruling out Americas as the home of a mother-culture.
The whole subject of diffusion is wide ranging and complex and well beyond my competence to do it justice in this short entry. However, for those interested in pursuing the subject further, I would like to recommend a 1997 paper(l) by David H. Kelley (1924-2011), available on Dale Drinnon’s website.
Egypt is frequently mentioned in this regard being seen as the influence behind Neolithic megalith building AND the pyramids of Central America, in spite of the fact that Newgrange was constructed before the Egyptian Pyramids and the New World pyramids were built thousands of years after those in Egypt. Atlantis is regularly suggested as another mother- culture but without a single piece of evidence to support this speculative contention. For decades the idea that the pyramids of Egypt and those in the Americas were the consequence of diffusion from a common source, namely Atlantis situated in the Atlantic was heavily promoted. However, we can now more closely identify the pyramids of America with the step-pyramids of China!
Consequently, for me, hyperdiffusion is not convincing. History has clearly shown that inventions have frequently been independently developed at the same time in different countries, while even in prehistoric times it has been demonstrated(f) that the evolution of stone tools took place as a result of the innovative abilities of local populations, addressing the same needs.
A word of warning; “recent research published in Nature by a team led by Tomos Proffitt at the University of Oxford shows that capuchin monkeys regularly produce sharp-edged flakes indistinguishable from those made by early hominins.”(t)
Even today technologies are developed independently throughout the world, but not in complete isolation, because of the instant worldwide communications available.
As a result of global marketing, in Ireland now we drive German, British and Japanese cars, use US computer technology and play with Chinese toys. However, being generous by nature, we gave the world the Irish pub, Riverdance and Guinness.
A two-part blog(m)(n) highlighting the many weaknesses in the concept of hyperdiffusion should be required reading for anyone interested in the subject.
Although Donnelly and his contemporaries, focused on the possibility of Old World influences in the New World, today, there is less of a Mediterranean centred or Eurocentric approach to diffusionism. Instead, there is greater acceptance that the Americas have also had extensive cultural influences from Asia.
(l) See: Archive 3563
*(u) Atlantis Rising No.110 March/April 2015 p.41*
A Tsunami was probably first described in the 5th century BC by Thucydides when he wrote “in my opinion, the cause of the phenomenon was this: where the earthquake was most violent, the sea receded and was then pushed back with even greater violence, thus bringing about a flood. Such a thing would not have happened without an earthquake” (Peloponnesian War, Book III.89)(b). However, there are also conditions that can produce tsunamis inland, such as occurred around 500 AD inundating Geneva in the Alps(k)(m).
The word ‘tsunami’ first appeared in an English language publication in the September 1896 edition of National Geographic Magazine in which the devastation caused by an earthquake wave in Japan was graphically described.
Recent studies(g) indicate that a similar tsunami saved the Greek town of Nea Poteidaia from a Persian attack in 479 BC. Herodotus in reporting the event attributed the Persian defeat to divine intervention by Poseidon, god of the sea.
A similar event on an even greater scale has been one of the suggestions as the possible cause of the flooding of Atlantis. A 2002 paper(a), by Louisiana State University geologist, Gary Byerly and his team, identified an ancient asteroid impact that generated a tsunami that “swept around the earth several times, inundating everything except the mountains”. The study of ancient tsunamis is at a very early stage of development.
Ivan T. Sanderson in one of his books, Investigating the Unexplained , recounts an 1863 report of a 200-foot high tsunami which sped up the Ganges and Houghli Rivers in India killing tens of thousands of people without ‘snapping-off’ trees. He contrasts this with the tree stumps covering acres around East Creek, New Jersey that have all been broken off at the same height and where he suggested that only a tsunami could have caused such widespread and uniform destruction. In view of the fact that some of these cedar trees had six foot diameter trunks he speculates on the possible size of a tsunami that could bring about such extreme damage.
Perhaps even more relevant to the study of Atlantis is the evidence gathered by Jürgen Spanuth in his chapter on the ‘Natural Catastrophes of the 13th Century’ including an interesting section on tsunamis[015.167].
Marc-André Gutscher of the University of Western Brittany in Plouzané, France, has discovered evidence of ancient tsunami on Spartel Island, an Atlantis candidate, in the Gulf of Cadiz. Georgeos Diaz-Montexano has pointed out that Josephus, the 1st century Jewish historian, seems to describe the devastation caused by its assault on the Atlantic coast of Spain and Portugal at the time of the Lusitanians and Cantabrians in the 1st millennium BC.
Professor Stefano Tinti of Bologna University visited Sardinia and explained(r) “that until the 1980s no one was aware that tidal waves had occurred in the Mediterranean. But since 2004 scientists have identified 350 events of this type over a 2,500-year period,” and regarding the Sardinian tsunami “So what would have been required in our case?” he then asked. “We’re talking about a huge volume of water, some 500 metres high [the elevation up to which the nuraghi were affected]. Only a comet could do that, if the impact occurred very close to the coast and in a very specific direction,” he asserted. An event of this sort may have occurred near Cagliari, with the resulting wave devastating the plain of Campidano.”
Tinti has also noted(w) that generally speaking, the majority of tsunamis are generated by seismic rather than volcanic activity. Globally, volcanic tsunamis account for only 2% of the total, however, the profusion of volcanoes in Southern Italy has considerably increased this percentage. Furthermore, according to a recent article on the BBC website “The scale of the tsunami hazard from volcanoes that collapse into the sea has been underestimated.”(x)
More recently, Dhani Irwanto has written of the probable effect of tsunamis on his Indonesian Atlantis(y). Studies of the sedimentary record in a sea-cave in Sumatra have revealed the frequency and strength of tsunamis in the region over a five thousand year span from 5900 BC until 900 BC(u).
Tsunamis are also associated with destruction on Crete following the eruption of Thera in the 2ndmillennium BC. A TV documentary entitled Sinking Atlantis(i), provided graphic evidence of tsunami damage on Minoan Crete(h).
J.V.Luce cited[120.119] a number a local legends from around the Aegean that may have originated with the tsunami that followed the eruption on Thera.
However, the extent of this damage is strongly contested by W. Sheppard Baird(j) and he proposes instead that it was in fact more likely to have been a pyroclastic surge from the Theran eruption that caused most damage.
A recent report(d) concludes that a large tsunami generated by the volcanic activity of Mt. Etna around 6000 BC produced waves up to 43 feet high that struck the coasts of Greece and Libya. This event would have caused devastation on nearby Malta, where evidence of past tsunamis was published in the journal Zeitschrift für Geomorphologie. The research was carried out over three years by scientists from the University of Portsmouth, led by Dr Malcolm Bray with assistance from colleagues at the Department of Geography at the University of Malta(n). A 1693 earthquake generated the earliest recorded tsunami on Malta and as recent as 1908 Malta was hit by a tsunami that resulted from a catastrophic earthquake in the vicinity of the Strait of Messina(p).
On the Atlantic west coast of Ireland we have a 250 km2 locality, in County Clare, known as the Burren, which consists of limestone denuded of soil cover. Recently, strong evidence was discovered suggesting a 4000 BC tsunami in the region(o). For me the karst landscape of the Burren is reminiscent of areas of Malta.
Plato’s description does not support the idea of a tsunami as the primary cause of Atlantis’ inundation since tsunamis will eventually subside and return to the ocean, whereas Atlantis was still under water years after the event, causing a permanent navigation hazard. John Michael Greer makes a similar point [345.126] in relation to the megatsunami which struck Madagascar 2800 BC. Evidence of other ancient megatsunamis in Hawaii was presented to 2012 meeting of the American Geophysical Union(l). The power of megatsunamis is highlighted in an article the UK’s MailOnline website(t).
Recent excavations at Olympia on the Peloponnese peninsula, the location of the original Olympic Games, have pointed to the site having been repeatedly hit by devastating tsunamis during the past 7,000 years(c).
The Bunurong tribe in Australia have a ‘myth’ which explains the creation of Melbourne’s Port Philip Bay. A recent article(e) has linked this to a tsunami which resulted from the impact of Comet Manhuika south-west of New Zealand in the 15th century. A more cautious view of this event is expressed elsewhere(f).
The excellent livescience.com website has an interesting list of ten history-making tsunamis(q), while Wikipedia offers an extensive list of European tsunamis from prehistoric times until the present(s).
A 100-metre-high tsunami, caused by a landslide, one of the highest ever recorded was experienced in a remote area of Greenland in June 2017. Four lives were lost and eleven houses destroyed in the fishing village of Nuugaatsiaq, located on an island about 20 kilometres away(v).
(a) See: Archive 2931