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Interactive map of latest earthquakes and active volcanoes in the world

Major mag. 7.9 earthquake - The 1906 San Francisco Earthquake (USA) on Wednesday, 18 April 1906

Major mag. 7.9 earthquake  - The 1906 San Francisco Earthquake (USA) on Wednesday, 18 April 1906
Date & time: Wednesday, 18 April 1906 13:12 UTC
Magnitude: 7.9
Depth: 11.7 km
Epicenter latitude / longitude: 37.75°N / 122.55°W (United States)
Nearest volcano: Clear Lake (137 km / 85 mi)
Nearby towns and cities:
9 km (6 mi) NW of Daly City (pop: 106,600)
9 km (6 mi) NW of Broadmoor (pop: 4,200)
11 km (7 mi) NW of Colma (pop: 1,500)
12 km (7 mi) SW of San Francisco (pop: 864,800)
74 km (46 mi) NW of San Jose (pop: 1,026,900)
131 km (81 mi) SW of Sacramento (pop: 490,700)
Primary data source: USGS
Estimated released energy: 4.5 x 1016 joules (12408 gigawatt hours, equivalent to 1.1 x 107 tons of TNT or 667.2 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
Wed, 18 Apr 13:12 UTCM 7.9 / 11.7 kmThe 1906 San Francisco Earthquake (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
97210 (876.1 km N of epicenter) [Map] / not felt (reported through our app)

Aftershocks of the 7.9 quake: The 1906 San Francisco Earthquake (USA), 18 Apr 1906 13:12

More info
Recorded aftershocks, latest first (6 quakes):
  • 27 Jan 1908 02:00 UTC
    | M 0.0 |
    0 km (0 mi) depth
    |
    344 km (214 mi) distance
    | USGS | Details
  • 07 Dec 1906 06:40 UTC
    | M 0.0 |
    0 km (0 mi) depth
    |
    319 km (198 mi) distance
    | USGS | Details
  • 07 May 1906 05:00 UTC
    | M 0.0 |
    0 km (0 mi) depth
    |
    164 km (102 mi) distance
    | USGS | Details
  • 07 May 1906 04:10 UTC
    | M 0.0 |
    0 km (0 mi) depth
    |
    164 km (102 mi) distance
    | USGS | Details
  • 02 May 1906 05:30 UTC
    | M 0.0 |
    0 km (0 mi) depth
    |
    92 km (57 mi) distance
    | USGS | Details
  • 23 Apr 1906 09:10 UTC
    | M 6.4 |
    0 km (0 mi) depth
    |
    382 km (238 mi) distance
    | USGS | Strong mag. 6.4 earthquake - Northern California (USA) on Monday, 23 April 1906

Earlier earthquakes in the same area since 1900

Major mag. 7.9 earthquake - The 1906 San Francisco Earthquake (USA) on Wednesday, 18 April 1906

Map of earlier quakes

 

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