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Major mag. 7.1 earthquake - Hector Mine, CA Earthquake (USA) on Saturday, 16 October 1999

Major mag. 7.1 earthquake  - Hector Mine, CA Earthquake (USA) on Saturday, 16 October 1999
Date & time: Saturday, 16 October 1999 09:46 UTC
Magnitude: 7.1
Depth: 13.7 km
Epicenter latitude / longitude: 34.60333°N / 116.265°W (United States)
Nearest volcano: Lavic Lake (37 km / 23 mi)
Nearby towns and cities:
52 km (33 mi) N of Joshua Tree (pop: 7,400)
56 km (34 mi) NW of Twentynine Palms (pop: 26,000)
57 km (35 mi) NE of Yucca Valley (pop: 21,600)
174 km (108 mi) NE of Anaheim (pop: 350,700)
192 km (119 mi) NE of Los Angeles (pop: 3,971,900)
200 km (124 mi) NE of Long Beach (pop: 474,100)
Primary data source: USGS
Estimated released energy: 2.8 x 1015 joules (783 gigawatt hours, equivalent to 6.7 x 105 tons of TNT or 42.1 atomic bombs!) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
TimeMag. / DepthLocationSource
Sat, 16 Oct 09:46 UTCM 7.1 / 13.7 kmHector Mine, CA Earthquake (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!

Aftershocks of the 7.1 quake: Hector Mine, CA Earthquake (USA), 16 Oct 1999 09:46

More info
Recorded aftershocks, latest first (2 quakes):
  • 16 Oct 1999 12:57 UTC
    | M 5.4 |
    0.8 km (0.5 mi) depth
    |
    18 km (11 mi) distance
    | USGS | Details
  • 16 Oct 1999 09:59 UTC
    | M 5.6 |
    6 km (3.7 mi) depth
    |
    82 km (51 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

Major mag. 7.1 earthquake - Hector Mine, CA Earthquake (USA) on Saturday, 16 October 1999
 

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