California earthquakes

M2.7 earthquake 5 km SSE of Bootjack, California

A magnitude 2.7 earthquake struck 5 km SSE of Bootjack, California on Wed, Mar 23, 1977, 8:45 PM PST (04:45 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.4 18km ENE of Le Grand, CA. This one was a foreshock.

Bootjack forecastMore in California

Map

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

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The earthquake

Magnitude
2.7 (md), micro
Local time
UTC
1977-03-24 04:45:31 UTC
Depth
0.5 km (0.3 mi), shallow
Epicenter
37.417° N, 119.855° 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 4.4 km horizontally, 17.1 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
196°, poorly surrounded by stations
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 3.418km ENE of Le Grand, CA · 18034 days ago · 6 km deep · 24 km away

Before

  1. 1.78 km ESE of Mammoth Lakes, California · 18098 days ago · 0 km deep · 88 km away
  2. 3.17 km SSW of Bootjack, California · 18099 days ago · 15 km deep · 5 km away
  3. 2.50 km W of Groveland, California · 18107 days ago · 19 km deep · 58 km away
  4. 2.05 km WSW of Aspen Springs, California · 18109 days ago · 2 km deep · 97 km away
  5. 2.114 km SE of Catheys Valley, California · 18111 days ago · 22 km deep · 15 km away
  6. 1.99 km SE of Catheys Valley, California · 18113 days ago · 22 km deep · 17 km away
  7. 2.02 km WSW of Buck Meadows, California · 18114 days ago · 34 km deep · 47 km away
  8. 2.211 km SE of Greeley Hill, California · 18115 days ago · 26 km deep · 33 km away
  9. 1.96 km ESE of Catheys Valley, California · 18117 days ago · 32 km deep · 16 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1034519. Read Wed, Sep 30, 2026, 2:27 AM UTC.