Magnitude
M4.9
- Depth
- 2.3 km
- Source
- USGS
95 km W of Petrolia, CA
M4.9 Earthquake near 95 km W of Petrolia, CA
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 29, 2026 at 02:41 UTC, a magnitude M4.9 earthquake occurred near 95 km W of Petrolia, CA. The hypocenter lay relatively close to the surface at around 2 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.
Details
ID
ccd934fe2d99b52ed40f473068f11357a17192a6
Magnitude
M4.9
Depth
2.3 km
UTC time
2026-08-29 02:41:09 UTC
Local time
—
Country
—
Source
usgs
Coordinates
40.42500,
-125.40334
Temperature
16.4°C
Depth profile
Shallow
2.3 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
Felt reports
2felt reports at EMSC / LastQuake
Voluntary reports of feeling this earthquake. The count is not an intensity measurement and is not added to USGS DYFI reports.
Data updated: Aug 29, 2026, 2:45 AM UTC · Last checked: Sep 21, 2026, 9:07 PM UTC
Source: EMSC / LastQuake
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 20, 2026, 2:41 AM UTC · Last checked: Sep 21, 2026, 9:07 PM UTC
Sep 20, 2026, 3:00 AM UTC – Sep 21, 2026, 3:00 AM UTC · Expired
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 0.11 % | 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 20, 2026, 3:00 AM UTC – Sep 27, 2026, 3:00 AM UTC
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 0.70 % | 0–0 |
| M ≥ 4.0 | 0.07 % | 0–0 |
| M ≥ 5.0 | < 0.01 % | 0–0 |
| M ≥ 6.0 | < 0.01 % | 0–0 |
| M ≥ 7.0 | < 0.01 % | 0–0 |
Sep 20, 2026, 3:00 AM UTC – Oct 20, 2026, 3:00 AM UTC
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 2.05 % | 0–0 |
| M ≥ 4.0 | 0.21 % | 0–0 |
| M ≥ 5.0 | 0.02 % | 0–0 |
| M ≥ 6.0 | < 0.01 % | 0–0 |
| M ≥ 7.0 | < 0.01 % | 0–0 |
Sep 20, 2026, 3:00 AM UTC – Sep 20, 2027, 3:00 AM UTC
| Magnitude | Probability ≥ 1 | Count (95% interval) |
|---|---|---|
| M ≥ 3.0 | 5.70 % | 0–1 |
| M ≥ 4.0 | 0.60 % | 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.
250
Felt reports · max reported intensity 4.3
Ground shaking
III
Weak · Intensity (MMI) III
Felt by a few, no damage.
Tectonic context
Located on the Juan de Fuca Plate.
Near the boundary Pacific ↔ Juan de Fuca · about 8 km away
Volcanoes nearby
No unambiguous area assignment
Context for this earthquake
This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.
Earthquake overviewStats (last 24h)
Global (24h)
647
Country (24h)
—
—
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