2.1

M2.1 Earthquake 10 km W of Boonville, CA — September 28, 2026

2026-09-28 20:16:28 UTC (4 days ago) · approx. 12:16 PM UTC-8 local

MagnitudeM2.1(md)
Time20:16 UTC≈ 12:16 PM UTC-8
Depth2.0 kmshallow crustal
Coordinates39.012°, -123.484°
Felt byNo felt reports
StatusAutomatic (preliminary)
Map showing earthquake epicenter at 39.01°, -123.48°

Earthquake Details

Magnitude
2.1 md
Depth
2.0 km
shallow crustal
Location
39.0123°N
-123.4842°E

Technical Information

Event ID
nc75443972
Event Type
earthquake
Status
Automatic
Significance
68
Stations Used
14
Azimuthal Gap
63.0°
Min Station Distance
0.109°
RMS Residual
0.08 sec
Last Updated
2026-09-28 21:57:22 UTC

Nearby Earthquakes (Last 7 Days)

3.3
9 km WSW of South Lake Tahoe, CA
20 hours ago · 10.9 km deep
3.0
8 km ESE of Cloverdale, CA
2 days ago · 4.0 km deep
2.6
1 km SW of Anderson Springs, CA
2 days ago · 1.8 km deep
2.6
6 km W of Yountville, CA
3 days ago · 8.3 km deep
2.5
2 km SSW of Round Valley, CA
3 days ago · 8.6 km deep
4.8
97 km W of Petrolia, CA
3 days ago · 10.0 km deep
3.2
275 km W of Indianola, California
4 days ago · 10.0 km deep
2.7
199 km W of Gold Beach, Oregon
4 days ago · 10.0 km deep
2.6
9 km NW of Redwood Valley, CA
5 days ago · -0.4 km deep
2.6
26 km WSW of Westley, CA
5 days ago · 2.7 km deep

Actions

View on USGSDid You Feel It?

Understanding This Data

Magnitude 2.1 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: nc75443972). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2026, September 28, 2026). M2.1 Earthquake 10 km W of Boonville, CA — September 28, 2026. Retrieved September 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75443972/