Data last collected:
QuakeFactsEvidence report · prepared 25 October 2026https://quakes99.com/entity/iscgem868364
USGS iscgem868364
4 Apr 1964, 18:59
70 km SSW of Akhiok, Alaska
A magnitude 6.5 mw earthquake at 22.6 km depth.
Published location
Where is 70 km SSW of Akhiok, Alaska?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
56.338000, -154.493000
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
iscgem868364
Coordinates
56.338, -154.493
Network
iscgem
Significance
648
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right 70 km SSW of Akhiok, Alaska earthquake: magnitude 6.5 and depth | QuakeFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at 70 km SSW of Akhiok, Alaska
Depth in another unit
The recorded event depth of 22.6 km is approximately 14.04 miles below the source reference surface. Depth alone does not describe damage or local hazard.
Interpreting the recorded coordinates
The published position for 70 km SSW of Akhiok, Alaska is 56.338° north and 154.493° west. This expresses the source coordinates in hemispheres; it does not establish an entrance, public access or a safe route.