QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem912226
USGS iscgem912226
14 May 1921, 12:17
172 km ENE of Bontang, Indonesia
A magnitude 6.5 mw earthquake at 35 km depth.
Published location
Where is 172 km ENE of Bontang, Indonesia?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
0.677000, 118.938000
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What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
iscgem912226
Coordinates
0.677, 118.938
Network
iscgem
Significance
654