Magnitude 4.0 Earthquake & Four Other Quakes In California

Magnitude 4.0 Earthquake & Four Other Quakes In CaliforniaPhoto by(@lockon16/iStock)

Magnitude 4.0 Earthquake & Four Other Quakes In CaliforniaPhoto by(@BridgetMulroy/MyShake)

California was jolted by a magnitude 4.0 earthquake this week. Thankfully, the earthquake didn’t have a big impact. Despite this, it was noted to have been significant (by USGS) due to its shallow depth. 

Four more shallow but moderately strong earthquakes also rocked California this week. All of the seismic activity has been detailed below.

Most of California’s earthquakes are shallow, and thoroughly investigated because of this. Shallow earthquakes are felt more than deeper earthquakes since the seismic waves have less space to travel.

The San Andreas Fault is known as a strike-slip fault since it falls along a boundary where two tectonic plates slide against each other in opposite directions. The American Plate slides Southward, and the Pacific Plate slides Northward. The Pacific Plate slides at a much faster rate than the American Plate. Seismic activity is usually more active on the Pacific Plate side of the fault line.

The following earthquakes have been documented by USGS, CalTech, EarthquakeTrack, and other contributors within California’s extensive seismic research programs. All are credible and globally recognized seismic activity monitoring systems. UTC is an abbreviation for Coordinated Universal Time.

Anyone with the MyShake App was alerted for the following earthquakes. There is no need to panic since seismic activity along the San Andreas Fault Line is normal.

Magnitude 4.0 Earthquake Strucl 115 km West of Petrolia, California: On 3 July 2023 at 5:56 PM UTC, a magnitude 4.0 earthquake struck Petrolia, California, at a depth of 26.3 km.

Magnitude 3.9 Earthquake Struck 13 km Northwest of Petrolia, California: On 4 July 2023 at 2:58 PM UTC, a magnitude 3.9 earthquake struck Petrolia, California, at a depth of 29.9 km.

Magnitude 3.8 Earthquake Struck 21 km South Southwest of Malibu, California: On 2 July 2023 at 9:29 AM UTC, a magnitude 3.8 earthquake struck Malibu, California, at a depth of 10.7 km.

Magnitude 3.5 Earthquake Struck 2 km Northeast of Almanor, California: On 5 July 2023 at 9:21 AM UTC, a magnitude 3.5 earthquake struck Almanor, California, at a depth of 5.3 km.

Magnitude 3.4 Earthquake Struck the Border of California and Nevada, 17 km North Northwest of Mina, Nevada: On 5 July 2023 at 2:16 AM UTC, a magnitude 3.4 earthquake struck the border of California and Nevada, in Mina, Nevada, at a depth of 10 km.