User:Inoffensive dinosaw/sandbox

The 1977 Sumba earthquake (also called the Sumbawa earthquake) occurred approximately 290 km south of Bima, Sumbawa, and beneath the Indian Ocean, at 14:08 local time on 19 August. With a moment magnitude of 8.3, the temblor is notable for having an unusually great, although not unprecedented, magnitude for a shock with a normal faulting focal mechanism. The shock occurred near the southern section of the Sunda Trench where several other tsunami-generating earthquakes have occurred. The temblor was at the time the largest outer-rise earthquake ever recorded in Indonesia, and aftershocks along the trench extended about 130 km eastward and 110 km westward from the epicenter.

Although damage from the temblor was limited to Indonesia, ground movement was reportedly felt as far afield as Albany in Australia, and the power supply was briefly cut in Port Headland. A tsunami was generated with observed run-up heights of up to 5.8 m and inundation distances of up to 1200 m at several locations on Sumba and Sumbawa. The combined number of victims from both the earthquake and tsunami in Indonesia was at least 107 confirmed dead and several dozen others missing, presumed dead; several sources combine the two for a total casualty figure of approximately 180 deaths and 1,100 injuries.

Earthquake
the eastward propagating rupture of the event was likely limited by the thick crust of the Scott plateau.

Damage
a 1.5 m run-up depth was reported by eyewitnesses along Kuta Beach, Lombok.