Information message about a strong earthquake in the Indian Ocean, near the Batu Islands, Indonesia, April 24, 2023

An earthquake (catastrophic at the epicenter on the scale SIS-17) with M=7.2 occurred on April 24, 2023 at 20:00 GMT (23:00 Moscow time) in the Indian Ocean, near the Batu Islands, Indonesia.<br /> SIS-17 - Earthquakes. Seismic intensity scale. State Standard 57546–2017.

Parameters of the earthquake have been determined in the Alert Service (AS) of Information Processing Center (IPC) of Geophysical Survey of RAS in Obninsk with station data obtained from digital and analog seismic stations of Russia, countries of CIS and from abroad. Alert message on this earthquake has been delivered in 15 min after registration to the Ministry of Emergency of the Russian Federation (EMERCOM).

Preliminary processing has been done with data from 33 stations, accurate processing - with data from 62.

The marker on the map is the epicenter of the earthquake, the origin of which was in the Indian Ocean, near the Batu Islands, Indonesia, at a depth of 10 km, 32 km E-NE of Hilibafunua, 190 km W-SW of Padang and 227 km NW of Padang Sidempuan.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 20:00:55.0 -0.59 98.68 10.0 62 7.2/40 6.5/45 10-10.5 66 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 20:01:07.4 -0.42 98.51 100.0 33 6.2/31 4.5-5 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 20:00:55.7 -0.72 98.58 15.8 369 Mw 6.8 39 CSEM
European - Mediterranean seismological center
4 20:00:55.1 -0.78 98.53 15.5 70 Mw 7.1/27 58 NEIC
National Earthquakes Information Center of US Geological Service