M 4.4 - 21km ESE of San Nicolas Is., CA
November 15, 2009 at 22:45:27 UTC
Depth: 5.67 km (Shallow)
Key Takeaway
This light earthquake (M4.4) occurred 16 years ago near 21km ESE of San Nicolas Is., CA, at a depth of 5.67 km (shallow). It was felt by 136 people.
Light
PAGER Alert
Tsunami
Felt Reports
Event Details
| Magnitude | 4.4 ml |
| Depth | 5.67 km (Shallow) |
| Location | 33.1655N, 119.3018W |
| Community Intensity | III (Weak) |
| Mercalli Intensity | III (Weak) |
| Felt Reports (DYFI) | 136 people |
| Alert Level (PAGER) | Green — No fatalities or damage expected |
| Tsunami Warning | No |
| Significance | 337 / 3000 |
| Status | Reviewed |
| Network | ci |
| USGS Event Page | View on USGS → |
Frequently Asked Questions
What was the magnitude of this earthquake?
This earthquake had a magnitude of 4.35, classified as "Light". Light earthquakes produce noticeable shaking but rarely cause damage.
How deep was this earthquake?
This earthquake occurred at a depth of 5.67 km, classified as "Shallow". Shallow earthquakes tend to cause more damage at the surface because the energy has less distance to travel before reaching buildings and infrastructure.
Where exactly did this earthquake occur?
This earthquake occurred near 21km ESE of San Nicolas Is., CA, at coordinates 33.1655N, 119.3018W. The location is determined by analyzing seismic wave arrival times at multiple monitoring stations.
Were there aftershocks associated with this event?
Aftershock data for this specific event can be explored by viewing nearby recent earthquakes listed below on this page. Aftershocks are smaller earthquakes that occur in the same area following a larger event, and they can continue for days, weeks, or even months depending on the original earthquake's magnitude.
What does the magnitude of this earthquake mean in practical terms?
A magnitude 4.35 earthquake is classified as "Light" — these are commonly felt by people indoors but rarely cause any significant damage.
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Data from the USGS Earthquake Hazards Program (ComCat). QuakeScan is not affiliated with the USGS. Event details may be updated as new data becomes available.