What was the magnitude of the 1994 Northridge quake?
What was the magnitude of the 1994 Northridge quake?
magnitude 6.7
A magnitude 6.7 quake caused by the sudden rupture of a previously undocumented blind thrust fault woke thousands of Angelenos, driving the City of Angels into a nightmarish frenzy.
What was the magnitude of the earthquake in California 1994?
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 large was the surface rupture from the Northridge earthquake?
approximately 15 by 20 kilometers
The rupture front spread out across the fault plane, so that the eventual size of the rupture covered an area of approximately 15 by 20 kilometers. The rupture then terminated at a depth of about 5-6 kilometers.
Was the Northridge earthquake the big one?
These earthquakes followed a 25 year “quiet period” after Northridge, which was a 6.7 magnitude earthquake that killed 58, injured more than 9,000 and caused more than $49 billion in economic loss. That quake lasted less than 20 seconds. In 2010, a 7.2 quake hit in Baja, and it was felt in parts of SoCal.
What’s the biggest earthquake in Los Angeles?
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.
What’s the biggest earthquake to hit California?
7.9- April 18, 1906. San Francisco.
Is a 6.8 earthquake big?
Strong: 6 – 6.9. Getty/AFP A strong earthquake is one that registers between 6 and 6.0 on the Richter scale. There are about 100 of these around the world every year and they usually cause some damage. In populated areas, the damage may be severe.
What was the magnitude of the Northridge earthquake in 1994?
Magnitude of 1994 Northridge earthquake. The 1994 Northridge earthquake was a moment magnitude 6.7 (M w), blind thrust earthquake that occurred on January 17, 1994, at 4:30:55 a.m. PST in the San Fernando Valley region of the County of Los Angeles.
Where is the epicentre of the Northridge earthquake?
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. Earthquakes: Fact or Fiction?
What caused the Northridge earthquake in California?
The quake was caused by the sudden rupture of a previously undocumented blind thrust fault. The Northridge quake, named after the San Fernando Valley community near its epicenter, was the costliest in U.S. history, with damages estimated at more than $20 billion, and resulted in 57 deaths.
What is the approximate location of Northridge?
“Northridge 1994: 6.7 – 1km NNW of Reseda, CA”. Comprehensive Catalog. U.S. Geological Survey. ^ Luco, Nicolas (2019). “Seismic design and hazard maps: Before and after”.