A magnitude 5.0 earthquake just struck seven miles N.E. of Napa ,California
The temblor had a depth of 3 miles and some say it was felt in San Fransisco. Others dispute that.

Napa Valley Earthquake: Magnitude 5.0 Strikes Northern California

The magnitude 5.0 quake struck near the town of Napa at 12:43 PDT.
Napa is best known for its vineyards and wineries. No damage or injury reports at this time.
The temblor was felt as far north as Hayward, which is located in the east bay of San Francisco.

Maps from the USGS show the quake was felt as far north as Hayward, located in the east bay area of San Francisco.

The following statistics are from the USGS.

Magnitude 5.0
Date-Time

* Friday, April 30, 2010 at 19:43:00 UTC
* Friday, April 30, 2010 at 12:43:00 PM at epicenter

Location 38.370°N, 122.205°W
Depth 5 km (3.1 miles) (poorly constrained)
Region NORTHERN CALIFORNIA
Distances

* 11 km (7 miles) NE (48°) from Napa, CA
* 13 km (8 miles) NNW (344°) from Green Valley, CA
* 14 km (9 miles) ESE (105°) from Yountville, CA
* 20 km (13 miles) W (275°) from Vacaville, CA
* 29 km (18 miles) N (5°) from Vallejo, CA
* 64 km (40 miles) N (2°) from Oakland, CA

Location Uncertainty horizontal +/- 14.9 km (9.3 miles); depth +/- 17.7 km (11.0 miles)
Parameters Nph= 5, Dmin=65 km, Rmss=0.2 sec, Gp=209°,
M-type=duration magnitude (Md), Version=0
Source

* California Integrated Seismic Net:
* USGS Caltech CGS UCB UCSD UNR

Event ID nc71390496
This event has not yet been reviewed by a seismologist.

So here we go again–California and earthquakes. Let’s all hope the aftershocks are minimal and that no one is injured.

We welcome your comments and theories on the earthquake-outbreak below.

Napa Valley Earthquake: Magnitude 5.0 Strikes Northern California is a developing story so please check back for updates.

Update: Earthquake didn’t happen

NAPA — The USGS sent out an alert of a 5.0 earthquake hitting the Napa area of northern California on Friday. It turns out a quake never hit.

This is the latest in a series of reported quakes that the USGS sent out alerts on that never happened, forcing them to retract them later.

Wow—just wow. Not to mention OOOOPS!!!!!!