scholarly journals Some Sumatra earthquakes

2012 ◽  
Vol 12 (2) ◽  
Author(s):  
J. Veldkamp
Keyword(s):  
Sumatra Earthquakes

The great Lisbon earthquake and tsunami of 1755: lessons from the recent Sumatra earthquakes and possible link to Plato's Atlantis

2006 ◽  
Vol 14 (2) ◽  
pp. 181-191 ◽  
Author(s):  
M.-A. GUTSCHER
Keyword(s):  
Subduction Zone ◽  
Subduction Zones ◽  
Coarse Grained ◽  
Great Earthquake ◽  
Seismic Profiles ◽  
Great Earthquakes ◽  
Lisbon Earthquake ◽  
Southern Iberia ◽  
High Resolution Bathymetry ◽  
Sumatra Earthquakes

Great earthquakes and tsunami can have a tremendous societal impact. The Lisbon earthquake and tsunami of 1755 caused tens of thousands of deaths in Portugal, Spain and NW Morocco. Felt as far as Hamburg and the Azores islands, its magnitude is estimated to be 8.5–9. However, because of the complex tectonics in Southern Iberia, the fault that produced the earthquake has not yet been clearly identified. Recently acquired data from the Gulf of Cadiz area (tomography, seismic profiles, high-resolution bathymetry, sampled active mud volcanoes) provide strong evidence for an active east dipping subduction zone beneath Gibraltar. Eleven out of 12 of the strongest earthquakes (M>8.5) of the past 100 years occurred along subduction zone megathrusts (including the December 2004 and March 2005 Sumatra earthquakes). Thus, it appears likely that the 1755 earthquake and tsunami were generated in a similar fashion, along the shallow east-dipping subduction fault plane. This implies that the Cadiz subduction zone is locked (like the Cascadia and Nankai/Japan subduction zones), with great earthquakes occurring over long return periods. Indeed, the regional paleoseismic record (contained in deep-water turbidites and shallow lagoon deposits) suggests great earthquakes off South West Iberia every 1500–2000 years. Tsunami deposits indicate an earlier great earthquake struck SW Iberia around 200 BC, as noted by Roman records from Cadiz. A written record of even older events may also exist. According to Plato's dialogues The Critias and The Timaeus, Atlantis was destroyed by ‘strong earthquakes and floods … in a single day and night’ at a date given as 11,600 BP. A 1 m thick turbidite deposit, containing coarse grained sediments from underwater avalanches, has been dated at 12,000 BP and may correspond to the destructive earthquake and tsunami described by Plato. The effects on a paleo-island (Spartel) in the straits of Gibraltar would have been devastating, if inhabited, and may have formed the basis for the Atlantis legend.

scholarly journals Outline of vertical displacement of the 2004 and 2005 Sumatra earthquakes revealed by satellite radar imagery

2006 ◽  
Vol 58 (1) ◽  
pp. e1-e4 ◽  
Author(s):  
Mikio Tobita ◽  
Hisashi Suito ◽  
Tetsuro Imakiire ◽  
Min Kato ◽  
Satoshi Fujiwara ◽  
...  
Keyword(s):  
Vertical Displacement ◽  
Radar Imagery ◽  
Satellite Radar ◽  
Satellite Radar Imagery ◽  
Sumatra Earthquakes

scholarly journals Differences in tsunami generation between the December 26, 2004 and March 28, 2005 Sumatra earthquakes

2006 ◽  
Vol 58 (2) ◽  
pp. 185-193 ◽  
Author(s):  
Eric L. Geist ◽  
Susan L. Bilek ◽  
Diego Arcas ◽  
Vasily V. Titov
Keyword(s):  
Tsunami Generation ◽  
Sumatra Earthquakes

scholarly journals Infrasound associated with 2004-2005 large Sumatra earthquakes and tsunami

2005 ◽  
Vol 32 (19) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. Le Pichon ◽  
P. Herry ◽  
P. Mialle ◽  
J. Vergoz ◽  
N. Brachet ◽  
...  
Keyword(s):  
Sumatra Earthquakes
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