A tectonic earthquake struck the Bima region of West Nusa Tenggara on Wednesday, May 20, 2026, at 17:28:50 WIB. According to updated analysis from the BMKG, the earthquake recorded a magnitude of M4.9.
The epicenter was located in the sea at coordinates 8.14° S and 119.21° E, approximately 12 km east of Wera, Bima. The tremor occurred at a shallow depth of 12 km.
Geological Cause and Mechanism
The BMKG identified the event as a shallow earthquake resulting from activity within the Flores back-arc thrust fault. Analysis of the source mechanism indicates a thrust fault movement.
Impact and Safety Assessment
The tremors were felt across Bima City, Bima Regency, and Dompu Regency. Despite the impact, modeling results confirm that this earthquake did not have the potential to trigger a tsunami.
Monitoring by the BMKG showed one aftershock occurred by 17:50 WIB. There is a possibility that further aftershocks could occur as the area stabilizes.
Official Information Channels
The Director of Earthquakes and Tsunamis at BMKG, Dr. Wijayanto, S.T., M.Sc., emphasizes that official information should only be sourced from verified BMKG channels.
These include the official website http://www.bmkg.go.id or inatews.bmkg.go.id, the Telegram channel https://t.me/InaTEWS_BMKG, and the @infoBMKG accounts on Instagram and Twitter.
Users may also access the “wrs-bmkg” or “infobmkg” mobile applications on iOS and Android for real-time updates.
Frequently Asked Questions
Did this earthquake cause a tsunami?
No, modeling results indicate that this earthquake did not have the potential to trigger a tsunami.
Which areas felt the earthquake?
The vibrations were felt in Bima City, Bima Regency, and Dompu Regency.
What caused the seismic activity in Bima?
The earthquake was a shallow tectonic event caused by the activity of the Flores back-arc thrust fault.
How do you stay informed during sudden seismic events in your region?
