Magnitude
M4.5
- Depth
- 9.0 km
- Source
- USGS
California · Trinity County
Country overviewUnited States · California
M4.5 Earthquake near Trinity County, California (United States)
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded Content updated:
Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.
Map
About this earthquake
On August 5, 2026 at 22:21 UTC, a magnitude M4.5 earthquake occurred near Trinity County, California (United States). The hypocenter lay relatively close to the surface at around 9 km, increasing how strongly it was felt. Tremors of this size are distinctly felt and can occasionally cause light damage.
The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 185 earthquakes, the strongest at M3.0.
Details
ID
e140b1d6682b0c9310bec6621949ea7b79c356b7
Magnitude
M4.5
Depth
9.0 km
UTC time
2026-08-05 22:21:58 UTC
Local time
—
Country
State
City
County
Source
usgs
Coordinates
40.02560,
-123.45080
Temperature
35.8°C
Depth profile
Shallow
9 km
9 km — shallower than the regional average (15.2 km)
Regional average: 15.2 km
Why depth matters
Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.
Depth classes per USGS
Official USGS aftershock forecast
Probability of at least one aftershock at or above the specified magnitude during the entire stated time window. This does not predict an individual earthquake.
Issued: Sep 16, 2026, 10:21 PM UTC · Last checked: Sep 21, 2026, 11:22 PM UTC
Sep 16, 2026, 11:00 PM UTC – Sep 17, 2026, 11:00 PM UTC · Expired
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 0.07 % | 0–0 |
| M ≥ 4.0 | < 0.01 % | 0–0 |
| M ≥ 5.0 | < 0.01 % | 0–0 |
| M ≥ 6.0 | < 0.01 % | 0–0 |
| M ≥ 7.0 | < 0.01 % | 0–0 |
Sep 16, 2026, 11:00 PM UTC – Sep 23, 2026, 11:00 PM UTC
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 0.46 % | 0–0 |
| M ≥ 4.0 | 0.05 % | 0–0 |
| M ≥ 5.0 | < 0.01 % | 0–0 |
| M ≥ 6.0 | < 0.01 % | 0–0 |
| M ≥ 7.0 | < 0.01 % | 0–0 |
Sep 16, 2026, 11:00 PM UTC – Oct 16, 2026, 11:00 PM UTC
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 1.56 % | 0–0 |
| M ≥ 4.0 | 0.16 % | 0–0 |
| M ≥ 5.0 | 0.02 % | 0–0 |
| M ≥ 6.0 | < 0.01 % | 0–0 |
| M ≥ 7.0 | < 0.01 % | 0–0 |
Sep 16, 2026, 11:00 PM UTC – Sep 16, 2027, 11:00 PM UTC
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 5.57 % | 0–1 |
| M ≥ 4.0 | 0.59 % | 0–0 |
| M ≥ 5.0 | 0.06 % | 0–0 |
| M ≥ 6.0 | < 0.01 % | 0–0 |
| M ≥ 7.0 | < 0.01 % | 0–0 |
The range is the 95% forecast interval for the number of earthquakes. Magnitude thresholds and time windows overlap: do not add the values. Windows already in progress still refer to the entire stated period.
Estimated impact
Green
No or minimal impact expected.
120
Felt reports · max reported intensity 3.8
Ground shaking
V
Moderate · Intensity (MMI) V
Felt by all, slight damage possible.
Tectonic context
Located on the North America Plate.
Near the boundary North America ↔ Pacific · about 61 km away
Volcanoes nearby
California
Context for this earthquake
21 Sep 2025 – 21 Sep 2026 · M ≥ 3.0 · 241 Catalogue entries
Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.
Open seismic profileHistoric earthquake map · United States
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Country statistics · United States
View earthquake KPIs, strongest and latest events, and averages for this country.
Stats (last 24h)
Global (24h)
653
Country (24h)
United States
185
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