Earthquake reference
3 km SW of Clayton, CA
USGS recorded this 1.5 magnitude event near 3 km SW of Clayton, CA at 2026-07-17T19:27:16.240000+00:00. The published hypocentral depth is -0.19 km and the review status is reviewed. Event parameters can be revised as additional observations are processed. Nearby airports and postal locations on this page are calculated spatial references only; they do not establish administrative jurisdiction, damage, causation or future risk. This record is not an earthquake forecast or emergency alert.
Key facts
- Magnitude
- 1.5
- Magnitude type
- md
- Occurred at
- 2026-07-17T19:27:16.240000+00:00
- Updated at
- 2026-07-28T22:59:34.641000+00:00
- Review status
- reviewed
- Event type
- quarry blast
- Tsunami flag
- No
- Significance
- 35
- Network
- nc
- Latitude
- 37.9223333333333
- Longitude
- -121.955
- Depth (km)
- -0.19
- USGS event page
- https://earthquake.usgs.gov/earthquakes/eventpage/nc75397886
Upstream revision context
USGS event revision
This timeline contains versions captured by DataOfWorld; it is not a complete official revision archive.
| Updated | Status | Payload digest |
|---|---|---|
| 2026-07-28T22:59:34.641000+00:00 | reviewed | d62a0a4fdae1 |
Associated event IDs: nc75397886
Field-level provenance
Sources for this profile
Dates and licenses apply to the specific facts and series supplied by each source.
USGS Earthquake Hazards Program
- Applicable date
- 2026-07-17
- Dataset version
- 63e48b3f8d6c
- License
- United States public domain
- Attribution
- U.S. Geological Survey
DataOfWorld deterministic earthquake profile template
- Applicable date
- 2026-07-17
- Dataset version
- earthquake-profile-v1
- License
- Original DataOfWorld text
- Attribution
- DataOfWorld
Reference data can change. Verify consequential decisions against the original source.