2.1

M2.1 Earthquake 5 km NW of Boron, CAAugust 28, 2024

2024-08-28 23:26:18 UTC (2024-08-28) · approx. 3:26 PM UTC-8 local

MagnitudeM2.1(ml)
Time23:26 UTC3:26 PM UTC-8
Depth-0.8 kmshallow crustal
Coordinates35.032°, -117.692°
Felt by1DYFI response
Status✓ Reviewed by USGS

On August 28, 2024 at 23:26 UTC, a magnitude 2.1 shallow crustal earthquake struck 5 km NW of Boron, CA, at a depth of -0.8 km and coordinates 35.0317°, -117.6915°.

Physical scale: An earthquake of magnitude 2.1 releases seismic energy equivalent to roughly 19.2 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 16 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 35.03°, -117.69°

Did You Feel It? — community-reported shaking

Aggregated felt-report intensity from 1 citizen response 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 M2.1 earthquake near 5 km NW of Boron, CA

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

Earthquake Details

Magnitude
2.1 ml
Depth
-0.8 km
shallow crustal
Location
35.0317°N
-117.6915°E
Felt Reports
1
DYFI responses
Community Intensity
2.0
CDI from reports

Technical Information

Event ID
ci40718215
Event Type
quarry blast
Status
✓ Reviewed
Significance
66
Stations Used
28
Azimuthal Gap
130.0°
Min Station Distance
0.097°
RMS Residual
0.16 sec
Last Updated
2024-08-29 17:38:09 UTC

Common Questions

How strong was the magnitude 2.1 earthquake near Boron, CA?

The magnitude 2.1 earthquake that struck 5 km NW of Boron, CA on August 28, 2024 at 23:26 UTC had a depth of -0.8 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 2.1 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 2.1 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: ci40718215). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2024, August 28, 2024). M2.1 Earthquake 5 km NW of Boron, CAAugust 28, 2024. Retrieved August 29, 2024 from https://www.earthquaketracker.org/earthquakes/event/ci40718215/