Very strong M7.6 earthquake hits Tanimbar Islands region, Indonesia

M7-6 earthquake Tanimbar Islands indonesia january 9 2023 location map f

A very strong earthquake registered by the USGS as M7.6 hit the Tanimbar Islands region, Indonesia at 17:47 UTC on January 9, 2023 (00:47 LT on January 10). The agency is reporting a depth of 105.1 km (65.3 miles). EMSC reports M7.6 at a depth of 100 km (62 miles), BMKG M7.5 at a depth of 130 km (81 miles).

The epicenter was located about 339.3 km (210.8 miles) WSW of Tual (population 39 502), and 426 km (264.7 miles) SSE of Ambon (population 355 596), Maluku, Indonesia.

36 000 people are estimated to have felt very strong shaking, 76 000 strong, 194 000 moderate, and 1 528 000 light.

The USGS issued a Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though resistant structures exist. The predominant vulnerable building types are unreinforced brick with concrete floor and precast concrete frame with wall construction.

After receiving preliminary data (M7.9), BMKG said there is a potential for tsunami and directed residents living in the affected regions to follow the tsunami early warning directions from the local government, BPBD, BNPB and BMKG.

The agency later revised the magnitude to M7.5 and canceled tsunami warnings.

Historical earthquakes of similar magnitude in this region have not produced tsunamis.

This is the largest earthquake in this region since M7.7 on June 24, 2019.

M7-6 earthquake Tanimbar Islands indonesia january 9 2023 location map bg
Image credit: TW/SAM, Google
M7-6 earthquake Tanimbar Islands indonesia january 9 2023 location map bg2
Image credit: TW/SAM, Google

Estimated population exposure to earthquake shaking

M7-6 earthquake Tanimbar Islands indonesia january 9 2023 usgs epe
M7-6 earthquake Tanimbar Islands indonesia january 9 2023 usgs epet

Selected cities exposed

M7-6 earthquake Tanimbar Islands indonesia january 9 2023 usgs sce

Regional seismicity

M7-6 earthquake Tanimbar Islands indonesia january 9 2023 emsc rs

Featured image credit: TW/SAM, Google

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