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1965 Ceram Sea earthquake

Earthquake in Indonesia

Field	Value
title	1965 Ceram Sea earthquake
timestamp	1965-01-24 00:11:17
isc-event	861299
anss-url	iscgem861299
local-date
local-time	09:11:17 IEST
map2	{{Location map	Indonesia Sulawesi
lat	-2.455
long	125.965
mark	Bullseye1.png
marksize	50
position	top
width	260
float	right
relief	yes
caption	}}
magnitude	8.2
depth	28.4 km
location
countries affected	Indonesia
tsunami	yes
type	Oblique-reverse
intensity
casualties	71 dead

| isc-event = 861299 | anss-url = iscgem861299 | local-date = | local-time = 09:11:17 IEST

The 1965 Ceram Sea earthquake occurred on January 24 at 00:11 UTC with a moment magnitude of 8.2 and its epicenter was located just off the southwestern coast of Sanana Island in eastern Indonesia. The event occurred at a depth of 28 kilometers under the Ceram Sea, and a tsunami was generated which caused damage in Sanana, Buru, and Mangole. During the tsunami three consecutive run-ups were reported in Seram Island, and a four-meter run-up was reported at Buru Island.

A series of tremors were reported during the week leading up to the mainshock. The number of people reported dead was 71 and up to 3,000 buildings and a total of 14 bridges were destroyed by both the earthquake and tsunami on Sanana.

Cause of earthquake/tsunami

The 1965 Ceram Sea earthquake was caused by a convergent plate boundary located near Indonesia. A convergent plate boundary is where a denser oceanic plate is forced under a continental plate in a process known as subduction. When the earthquake occurred, the plates shifted releasing massive amounts of energy and causing a large displacement of water. This water then moves very fast towards land until it approaches the shore, where wave shoaling builds up the height of the tsunami. This added height from the friction of the shoreline allows the wave to travel far inland wreaking havoc on communities. This tsunami, in combination with the earthquake, is responsible for the 71 deaths. Indonesia is especially susceptible to earthquakes and tsunamis in large part due to its proximity to the Ring of Fire, an area notable for high levels of seismic activity. Events such as tsunamis cause massive amounts of physical and economic damage to regions such as Indonesia.

References

(1970). "Earthquake mechanisms and island arc tectonics in the Indonesian-Philippine region". Bulletin of the Seismological Society of America.
"M7.4 Sulawesi, Indonesia Earthquake of 16 November, 2008".
(January 10, 2000). "Active deformation in eastern Indonesia and the Philippines from GPS and seismicity data". Journal of Geophysical Research.
"Historic Earthquakes – Sanana, Indonesia (Ceram Sea)". United States Geological Survey.
Shanmugam, G.. (January 2008). "Leaves in turbidite sands: The main source of oil and gas in the deep-water Kutei basin, Indonesia: Discussion". [[AAPG Bulletin]].
"Les tsunamis en Indonésie: interroger le passé pour aborder les risques futurs".
"Convergent Plate Boundaries – Convergent Boundary – Geology.com".
"How do earthquakes generate tsunamis?".
"Refraction/Diffraction".
"What is the "Ring of Fire?"". Oregon State University.
"EBSCO Industries".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

1965-earthquakes 1965-in-indonesia megathrust-earthquakes-in-indonesia 1960s-tsunamis tsunamis-in-indonesia january-1965-in-asia 1965-disasters-in-indonesia

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