Categorized | Earthquake, News, Tsunami

Very strong 7.8M quake in Indian Ocean, no tsunami threat to Hawaii

Magnitude
7.8

Time
2016-03-02 12:49:48 (UTC)
2016-03-02 02:49:48 HST

Nearby Cities
659km (409mi) SW of Muara Siberut, Indonesia
804km (500mi) SW of Pariaman, Indonesia
805km (500mi) WSW of Padang, Indonesia
843km (524mi) WSW of Solok, Indonesia
849km (528mi) NNW of West Island, Cocos Islands

Energy map of quake. March 2, 2016

Energy map of quake. March 2, 2016

UPDATE: No tsunami threat for the coastlines of India or Australia.

Potential tsunami threat to areas in the Indian Ocean. People in the Indian Ocean area should seek information from regional tsunami service providers in Indonesia, Australia, & India for more.

USGS: How large does an earthquake have to be to cause a tsunami?

Magnitudes below 6.5
Earthquakes of this magnitude are very unlikely to trigger a tsunami.

Magnitudes between 6.5 and 7.5
Earthquakes of this size do not usually produce destructive tsunamis. However, small sea level changes may be observed in the vicinity of the epicenter. Tsunamis capable of producing damage or casualties are rare in this magnitude range but have occurred due to secondary effects such as landslides or submarine slumps.

Magnitudes between 7.6 and 7.8
Earthquakes of this size may produce destructive tsunamis especially near the epicenter; at greater distances small sea level changes may be observed. Tsunamis capable of producing damage at great distances are rare in the magnitude range.

Magnitude 7.9 and greater
Destructive local tsunamis are possible near the epicenter, and significant sea level changes and damage may occur in a broader region.

Note that with a magnitude 9.0 earthquake, the probability of an aftershock with a magnitude exceeding 7.5 is not negligible. To date, the largest aftershock recorded has been magnitude 7.1 that did not produce a damaging tsunami.

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