California earthquakes

M1.7 earthquake 0 km ENE of Millbrae, California

A magnitude 1.7 earthquake struck 0 km ENE of Millbrae, California on Mon, Mar 5, 1990, 9:51 AM PST (17:51 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M5.4 5 km NNW of Aromas, California. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-03-05 17:51:28 UTC
Depth
11.9 km (7.4 mi), shallow
Epicenter
37.602° N, 122.379° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.3 km horizontally, 0.9 km in depth
Depth from
From location
Station coverage gap
69°
Stations used
13

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 188 in the 60 days after this one and 76 in the 30 days before it.

After

The first 60 of 188.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc153714. Read Sat, Oct 3, 2026, 11:40 AM UTC.