Strong mag. 6.6 earthquake - 22km W of Westmorland, CA (USA), on Tuesday, 24 November 1987 at 13:15 (GMT)

Strong mag. 6.6 earthquake  - 22km W of Westmorland, CA (USA), on Tuesday, 24 November 1987 at 13:15 (GMT)

Strong magnitude 6.6 earthquake at 11 km depth

Date & time: 24 Nov 1987 01:15:56 UTC###AGESTRINGCOPY###
Magnitude: 6.6
Depth: 11.2 km
Epicenter latitude / longitude: 33.015°N / 115.852°W (--, United States)
Nearest volcano: Salton Buttes (30 km / 19 mi)
Nearby towns and cities:
57 km (35 mi) NW of Mexicali (Baja California, Mexico) (pop: 597,100)
85 km (53 mi) SE of Indio (Riverside County, California) (pop: 87,500)
107 km (66 mi) NE of El Cajon (San Diego County, California) (pop: 103,700)
118 km (73 mi) E of Rancho Penasquitos (pop: 60,000)
119 km (74 mi) NW of Yuma (Arizona) (pop: 94,100)
122 km (76 mi) NE of Chula Vista (San Diego County, California) (pop: 265,800)
250 km (155 mi) SE of Los Angeles (California) (pop: 3,971,900)
355 km (220 mi) W of Phoenix (Arizona) (pop: 1,563,000)
Primary data source: USGS
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 atomic bombs!) [learn more]
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
MagnitudeDepthLocationSource
M 6.611 km22km W of Westmorland, CA (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Aftershocks of the 6.6 quake 22km W of Westmorland, CA (USA), 24 November 13:15 UTC

More info
Recorded aftershocks, latest first (746 quakes):
  • 22 May 1988 10:23 UTC
    | M 2.6 |
    4.1 km (2.5 mi) depth
    |
    25 km (15 mi) distance
    | USGS | Details
  • 21 May 1988 22:24 UTC
    | M 2.6 |
    5.7 km (3.5 mi) depth
    |
    112 km (69 mi) distance
    | USGS | Details
  • 20 May 1988 08:32 UTC
    | M 2.7 |
    12.5 km (7.8 mi) depth
    |
    56 km (35 mi) distance
    | USGS | Details
  • 17 May 1988 23:20 UTC
    | M 2.7 |
    2.3 km (1.4 mi) depth
    |
    34 km (21 mi) distance
    | USGS | Details
  • 17 May 1988 19:40 UTC
    | M 3.0 |
    7.2 km (4.5 mi) depth
    |
    45 km (28 mi) distance
    | USGS | Details
  • 17 May 1988 19:38 UTC
    | M 4.3 |
    8.2 km (5.1 mi) depth
    |
    44 km (28 mi) distance
    | USGS | Details
  • 16 May 1988 07:07 UTC
    | M 2.5 |
    3.2 km (2 mi) depth
    |
    44 km (27 mi) distance
    | USGS | Details
  • 15 May 1988 21:00 UTC
    | M 2.6 |
    2.7 km (1.7 mi) depth
    |
    36 km (22 mi) distance
    | USGS | Details
  • 14 May 1988 19:41 UTC
    | M 2.5 |
    7.7 km (4.8 mi) depth
    |
    88 km (55 mi) distance
    | USGS | Details
  • 10 May 1988 21:47 UTC
    | M 2.6 |
    -0.8 km (-0.5 mi) depth
    |
    117 km (72 mi) distance
    | USGS | Details
  • 10 May 1988 20:16 UTC
    | M 2.6 |
    4.5 km (2.8 mi) depth
    |
    24 km (15 mi) distance
    | USGS | Details
  • 10 May 1988 15:13 UTC
    | M 2.7 |
    8.9 km (5.5 mi) depth
    |
    35 km (22 mi) distance
    | USGS | Details
  • 10 May 1988 07:36 UTC
    | M 2.8 |
    12.1 km (7.5 mi) depth
    |
    59 km (36 mi) distance
    | USGS | Details
  • 07 May 1988 21:39 UTC
    | M 2.7 |
    2.9 km (1.8 mi) depth
    |
    35 km (22 mi) distance
    | USGS | Details
  • 06 May 1988 09:18 UTC
    | M 2.6 |
    2.7 km (1.7 mi) depth
    |
    33 km (21 mi) distance
    | USGS | Details
  • 04 May 1988 03:40 UTC
    | M 2.7 |
    4.2 km (2.6 mi) depth
    |
    35 km (22 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

Strong mag. 6.6 earthquake - 22km W of Westmorland, CA (USA), on Tuesday, 24 November 1987 at 13:15 (GMT)
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