QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us1000hb0u
USGS us1000hb0u
12 Oct 2018, 10:40
Pacific-Antarctic Ridge
A magnitude 5.6 mww earthquake at 10 km depth.
Published location
Where is Pacific-Antarctic Ridge?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-55.123300, -128.878400
Open the interactive map ↗Map data © OpenStreetMap contributors
What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Continue exploring
Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
us1000hb0u
Coordinates
-55.1233, -128.8784
Network
us
Significance
482