QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/ushis571
USGS ushis571
23 Jun 1915, 03:59
The 1915 Imperial Valley, California Earthquakes (First Major Event)
A magnitude 6 mw earthquake at 0 km depth.
Published location
Where is The 1915 Imperial Valley, California Earthquakes (First Major Event)?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
32.800000, -115.500000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
ushis571
Coordinates
32.8, -115.5
Network
ushis
Significance
554