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- Seventeen people were injured in Humboldt County, California, when a powerful a 6.4 magnitude earthquake struck Tuesday, also damaging roads and buildings and knocking out power and water to thousands of people, authorities said. At least two people died after the earthquake hit at 2:34 a.m. Tuesday in Northern California’s Eureka area.
Aug 14, 2024 · San Francisco earthquake of 1989, major earthquake that struck the San Francisco Bay Area, California, U.S., on October 17, 1989, and caused 63 deaths, nearly 3,800 injuries, and an estimated $6 billion in property damage.
- The Editors of Encyclopaedia Britannica
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Dec 18, 2009 · On October 17, 1989, a magnitude 6.9 earthquake hit the San Francisco Bay Area, killing 67 people and causing more than $5 billion in damages. Despite the fact that the disaster was one of the...
Casualties. 63 killed, 3,757 injured [1][9] The 1989 Loma Prieta earthquake occurred on California's Central Coast on October 17 at 5:04 p.m. local time. The shock was centered in The Forest of Nisene Marks State Park in Santa Cruz County, approximately 10 mi (16 km) northeast of Santa Cruz on a section of the San Andreas Fault System and was ...
- Where
- How Big
- Aftershocks
- Damage
- Warning Signs
- The Fault
- Magnitude Defined
- What If
The epicenter was on the San Andreas fault roughly 56 miles south of San Francisco and 10 miles northeast of Santa Cruz, near Mt. Loma Prieta in the Santa Cruz Mountains. The focal depth was 11 miles (typical California earthquake focal depths are 4 to 6 miles). Loma Prleta ruptured the southernmost 30 miles of the break that caused the 1906 San Fr...
Magnitude established at 6.9 after consultation with monitoring stations around the world. The Loma Prieta quake was felt as far away as San Diego and western Nevada.
A magnitude 5.2 aftershock occurred approximately 2.5 minutes after the main shock. In the week following Loma Prieta, 20 aftershocks magnitude 4.0 or greater and more than 300 of magnitude 2.5 or greater were recorded. Thousands of aftershocks were recorded. The aftershock zone stretched 25 miles, from north of Los Gatos near Highway 17 to south o...
Damage and business interruption estimates reached as high as $10 billion, with direct damage estimated at $6.8 billion. 18,306 houses were damaged and 963 were destroyed. 2,575 businesses were damaged and 147 were destroyed. The most notable damage included the collapse of the elevated Cypress Structure section of Interstate 880 in Oakland, the co...
Geologists had forecast a major earthquake in this area based on historical data, especially the lack of a major seismic event along the San Andreas fault since 1906 -- the 8.3 San Francisco earthquake. In the 83 years prior to the 1906 quake, seven damaging earthquakes of magnitude 6.5 or greater occurred. Only two have occurred since the San Fran...
The San Andreas Fault is the boundary between the North American plate and the Pacific plate. Land west of the fault has been moving to the northwest relative to land on the east at an average rate of 2 inches per year for millions of year. This motion typically occurs in sudden jumps during large earthquakes. The Pacific plate moved 6.2 feet to th...
Magnitude is a measure of an earthquake's size, but rather than being a direct measure of the level of ground shaking, it is a measurement of the strength of the seismic sound waves given off by the earthquake. A magnitude 8 earthquake radiates 30 times more energy of a magnitude 7 and 900 times the energy of a magnitude 6. Strong ground shaking f...
As devastating as Loma Prieta was, a magnitude 7.5 earthquake on the Hayward Fault in the East Bay could do $65 billion in damage.
Oct 16, 2019 · Dozens of cars and trucks were crushed under concrete. Forty-two people died on the Cypress Freeway and dozens more were injured. Many people were pulled out in the hours after the freeway...
Oct 17, 2022 · The Loma Prieta Earthquake struck the San Francisco Bay Area on Oct. 17, 1989, killing 63 people and injuring thousands. Here's a look back 33 years later.
5 hours ago · A magnitude 4.7 earthquake has been detected in California’s Ventura County, according to the United States Geological Survey. The earthquake, which struck at 7:28 a.m., was centered about 4 ...
