1966 Hualien Earthquake
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The 1966 Hualien earthquake occurred on March 13 at . The epicenter was located in the offshore area between
Yonaguni Island , one of the Yaeyama Islands, is the westernmost inhabited island of Japan, lying from the east coast of Taiwan, between the East China Sea and the Pacific Ocean proper. The island is administered as the town of Yonaguni, Yaeyama Gun, Okinawa ...
, Japan and Hualien, Taiwan. The intensity in Yonaguni reached shindo 5. Two people were reported dead in Yonaguni, Japan, and four in Taiwan. Building damage was reported. A tsunami with a run-up height of was observed. This earthquake released a
seismic moment Seismic moment is a quantity used by seismologists to measure the size of an earthquake. The scalar seismic moment M_0 is defined by the equation M_0=\mu AD, where *\mu is the shear modulus of the rocks involved in the earthquake (in pascals (Pa) ...
of 4.86×1020 Nm. The magnitude of this earthquake was put at 8.0, 7.79, 7.8, or 7.8. This earthquake had a strike-slip faulting focal mechanism. The fault plane solutions of this earthquake suggested that there is a sliver of crust off the east coast of Taiwan other than the
Philippine Sea Plate The Philippine Sea Plate or the Philippine Plate is a tectonic plate comprising oceanic lithosphere that lies beneath the Philippine Sea, to the east of the Philippines. Most segments of the Philippines, including northern Luzon, are part of ...
. The map of shallow earthquakes shows that the Philippines are encircled by a zone of seismicity. There is a difference between the slip direction in the east coast of the Philippines and the relative motion between the Philippine Sea Plate and the
Eurasian Plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and ...
. Together with other evidences, it has been suggested that most of the Philippines might belong to a minor plate other than the Eurasian Plate.


See also

*
List of earthquakes in 1966 This is a list of earthquakes in 1966. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the ...
*
List of earthquakes in Taiwan Taiwan is in a seismically active zone, on the Pacific Ring of Fire, and at the western edge of the Philippine Sea Plate.Taiwan Yearbook 2005, p. 23 Geologists have identified 42 active faults on the island, but most of the earthquakes detected i ...


References


External links

* {{Authority control Hualien Earthquake, 1966 Megathrust earthquakes in Taiwan 1966 tsunamis 1966 in Taiwan Tsunamis in Taiwan