2.9

M2.9 Earthquake 12km SSE of Tres Pinos, CA — July 25, 2020

2020-07-25 21:15:10 UTC (2020-07-25) · approx. 1:15 PM UTC-8 local

MagnitudeM2.9(md)
Time21:15 UTC≈ 1:15 PM UTC-8
Depth4.7 kmshallow crustal
Coordinates36.683°, -121.283°
Felt by5DYFI responses
Status✓ Reviewed by USGS

On July 25, 2020 at 21:15 UTC, a magnitude 2.9 shallow crustal earthquake struck 12km SSE of Tres Pinos, CA, at a depth of 4.7 km and coordinates 36.6833°, -121.2828°.

Physical scale: An earthquake of magnitude 2.9 releases seismic energy equivalent to roughly 362 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 62 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 36.68°, -121.28°

Did You Feel It? — community-reported shaking

Aggregated felt-report intensity from 5 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.

USGS DYFI community-reported intensity map for the M2.9 earthquake near 12km SSE of Tres Pinos, CA

Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report

Earthquake Details

Magnitude
2.9 md
Depth
4.7 km
shallow crustal
Location
36.6833°N
-121.2828°E
Felt Reports
5
DYFI responses
Community Intensity
3.4
CDI from reports

Technical Information

Event ID
nc73433146
Event Type
earthquake
Status
✓ Reviewed
Significance
133
Stations Used
68
Azimuthal Gap
56.0°
Min Station Distance
0.029°
RMS Residual
0.11 sec
Last Updated
2020-10-03 17:32:23 UTC

Common Questions

How strong was the magnitude 2.9 earthquake near Tres Pinos, CA?

The magnitude 2.9 earthquake that struck 12km SSE of Tres Pinos, CA on July 25, 2020 at 21:15 UTC had a depth of 4.7 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.9 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 2.9 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: nc73433146). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2020, July 25, 2020). M2.9 Earthquake 12km SSE of Tres Pinos, CA — July 25, 2020. Retrieved October 3, 2020 from https://www.earthquaketracker.org/earthquakes/event/nc73433146/