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Today's in W Java has a strike-slip mechanism according to moment tensor solution by BMKG, Indonesian Meteorology, Climatology, and Geophysical Agency - inatews.bmkg.go.id/

See map πŸ‘‡πŸΌ with the "beach ball" showing the fault mechanism with two possible very steep fault planes.

Hypocenter shallow depth ~11km and closeness to Cianjur town (less than 10km), where damages are reported, likely explains its destructive character. Strong shaking also reported in Jakarta at ~80km from the epicenter.

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This recalls that even in contexts like or , where the may produce very big , much smaller shallow crustal ruptures may present significant hazards because closer to towns.
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