The July 11, 1942 earthquake
M5.0near Tonopah, Nevada
A magnitude 5.0 earthquake, centred in Nye County. The 96th strongest in Nevada’s record since 1900, and the strongest within 50 miles since a magnitude 5.5 on May 11, 1939. 1 aftershock of magnitude 2.5 or more followed within 30 days.
The earthquake
- Magnitude
- 5.0
- local magnitude (ml)
- Depth
- —
- Not recorded
- Local time
- Saturday, July 11, 1942
- 09:41 PWT; 16:41 UTC
- In Nevada’s record
- 96th
- strongest of 8,110 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event ushis1402 (“49 km NNE of Tonopah, Nevada”). The USGS event page carries the ShakeMap, felt reports and the official summary.
Aftershocks
Earthquakes of magnitude 2.5 or more within 20 miles of the epicentre in the 30 days after.
1
Aftershocks in 30 days
4.5
Largest aftershock, Jul 11, 1942
1
On the first day
0
In the 7 days before
- The search radius is the surface rupture length expected for an earthquake of this magnitude (Wells and Coppersmith, 1994), at least 20 and at most 600 miles, so a great earthquake's sequence is counted along its whole fault.
- Before the modern seismic networks of the 1970s many small aftershocks went unrecorded, so early sequences read short.
Counties and cities within 50 miles
Distance from the epicentre to each county boundary (zero when inside) and to each city centre.
Counties
- Nye CountyNV · inside
- Esmeralda CountyNV · 30.7 mi
- Mineral CountyNV · 32.0 mi
- Lander CountyNV · 47.5 mi
Earthquakes around the epicentre
401 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.
Earlier earthquakes of magnitude 5 or more within 50 miles, strongest first
- December 20, 1932M6.8
- February 13, 1933M5.5
- May 11, 1939M5.5
- October 27, 1933M5.5
- January 11, 1933M5.2
- June 11, 1933M5.2
- May 9, 1933M5.1
- March 12, 1933M5.0
- January 29, 1933M5.0
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.