What was the magnitude of the 1971 earthquake?
What was the magnitude of the 1971 earthquake?
On February 9, 1971 at 6:01 am PST, a devastating M6. 6 earthquake struck the densely populated metropolitan area of Los Angeles, leaving death and destruction in its wake.
How big was the San Fernando Valley earthquake?
The earthquake occurred just after 4:30 am local time along a previously undiscovered blind thrust fault in the San Fernando Valley. Its epicentre was in Northridge, a suburb located about 20 miles (32 km) west-northwest of downtown Los Angeles. The major shock lasted 10–20 seconds and registered a magnitude of 6.7.
How long did the 1971 San Fernando earthquake last?
about 60 seconds
The San Fernando earthquake occurred on February 9, 1971, at 6:00:41 am Pacific Standard Time (14:00:41 UTC) with a strong ground motion duration of about 12 seconds as recorded by seismometers, although the whole event was reported to have lasted about 60 seconds.
How many people died in the San Fernando earthquake?
64 people
The San Fernando earthquake struck Southern California 50 years ago, killing 64 people and costing over $500 million in damages.
When was the worst earthquake in LA?
On January 17, 1994, an earthquake rocks Los Angeles, California, killing 54 people and causing billions of dollars in damages. The Northridge quake (named after the San Fernando Valley community near the epicenter) was one of the most damaging in U.S. history.
When was the biggest earthquake in LA?
On the early morning of June 28, 1992, a magnitude 7.3 (Mw) earthquake—the largest Southern California earthquake in 40 years—struck, rupturing five different faults! Although its epicenter was in a sparsely populated area, it was said to have been felt throughout the Los Angeles area, Arizona, Nevada, and Idaho.
When was the last 5.0 earthquake in LA?
The magnitude 5.1 La Habra earthquake occurred on March 28, 2014. It was felt throughout Southern California, including in Orange, Los Angeles, Ventura, Riverside and San Bernardino counties.
When was the last 7.0 earthquake?
May 18, 1940
California’s Largest Recorded Earthquakes Since 1800, Ranked by Magnitude
| Magnitude | Date | Location |
|---|---|---|
| 7.1 | July 5, 2019 | Ridgecrest/Trona |
| 7.0 | May 18, 1940 | El Centro |
| 6.9 | Oct. 17, 1989 | Bay Area |
| 6.7 | Jan. 17, 1994 | Northridge |
Is a magnitude 11 earthquake possible?
No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake.
Is a 9.0 earthquake possible in California?
Geophysicists estimate that the Cascadia Subduction Zone, an intersection of tectonic plates just off the northwestern coast that stretches from the northern tip of California up to Canada, is capable of generating an earthquake with a magnitude as high as a 9.0 .
How long can a 10.0 earthquake last?
A magnitude 10 quake would likely cause ground motions for up to an hour, with tsunami hitting while the shaking was still going on, according to the research. Tsunami would continue for several days, causing damage to several Pacific Rim nations.
Why is a 10.0 earthquake impossible?