ANF
USArray
Flexible Arrays
Home » Special Events » Magnitude 4.5 earthquake in the Greater Los Angeles area, California
last updated: 01/09/09 08:10.31 (PST)
On Thursday January 8 2009 at 7:49 PM (PST) the USArray seismic network recorded an earthquake (preliminary Mw 4.5) located in the Greater Los Angeles area, California.
Initial source parameters for this tremor are indicated below. The epicentral distance (i.e. distance separating the epicenter and the closest station in the recording network, BFS) for the USArray is 36 km (0.32 degrees).
If you felt the quake, the USGS would like to know. Please add your comments to the USGS page "Did you feel it?".
Summary
| Solution Parameters | |
|---|---|
| Local Date: | Thursday January 8, 2009 |
| Local Time: | 7:49 PM PST |
| Universal Time: | 01/09/09 (009) 03:49.46 UTC |
| Magnitude: | 4.5 Mw |
| Latitude: | 34.1072 |
| Longitude: | -117.3043 |
| Depth: | 14 km |
| Author: | cit_10370141 |
| Authoritative: | yes |
Proximity to Population Centers
- 3 km (2 miles) SSW (202°) from San Bernardino, CA
- 5 km (3 miles) NNE (19°) from Colton, CA
- 7 km (4 miles) E (94°) from Rialto, CA
- 87 km (54 miles) E (86°) from Los Angeles Civic Center, CA
Maps
Mercator projection regional view
The red star denotes the earthquake epicenter. Triangle symbols are active stations at the time of the earthquake in the USArray (excluding ANSS backbone stations and GSN stations, which are represented by a diamond symbol) and colored by network. Gray lines are major rivers.
| Transportable Array (TA) | |
| UC San Diego (AZ) | |
| CalTech (CI) | |
| UN Reno (NN) | |
| Uni. Utah (UU) | |
| ANSS backbone stations (US) | |
| Global Seismograph Network (IU) |
Regional satellite view
The red marker denotes the earthquake epicenter.
Detailed terrain view
The red marker denotes the earthquake epicenter.
Waveforms
You may view plots showing this event as recorded by USArray instruments:
- 3 components recorded by BFS, the closest USArray station to the event
- Large 3 components recorded by BFS, the closest USArray station to the event
- Vertical components from every eighth USArray station that recorded the event across the whole network
3 components recorded by BFS, the closest USArray station to the event:
News links
- USGS page for this event
- LA Times: "Magnitude 4.5 quake felt across Southern California"
- CNN: "Mild quake shakes Southern California"
Search the internet
To search the internet for more information about this event, click on the button below:
Current seismic activity measured by USArray
Click the links below to observe near real time maps of earthquakes recorded by the USArray deployment:
Further information
Learn more about the Array Network Facility (ANF) component of USArray, the USArray experiment, the EarthScope project, and the Incorporated Research Institutions for Seismology (IRIS).
