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When was the Loma Prieta earthquake?
Why was the San Francisco-Oakland earthquake called the Loma Prieta earthquake?
Why was the 1989 Loma Prieta earthquake a wakeup call?
How did the Loma Prieta earthquake affect the Bay Area?
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 named for the nearby Loma Prieta Peak in the ...
- 63 killed, 3,757 injured
- $5.6–6 billion (equivalent to $13.2–14.2 billion today)
- 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.
May 13, 2024 · Map of the 1989 San Francisco–Oakland earthquake (also known as the Loma Prieta earthquake). The quake struck with a moment magnitude of 6.9 on October 17, just before the start of the third game of the World Series, which was being held at San Francisco's Candlestick Park.
- The Editors of Encyclopaedia Britannica
On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. It was a tragic reminder of the destructive power of earthquakes. However, it was also a watershed moment in seismic research. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it.
Oct 17, 2022 · Sep 23, 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.
- 41 sec
- NBC Bay Area staff
Dec 18, 2009 · The disaster is known as both as the San Francisco-Oakland earthquake and the Loma Prieta earthquake because it was centered near Loma Prieta Peak in the Santa Cruz Mountains. On...
Oct 1, 2022 · The Loma Prieta earthquake ended decades of seismic tranquility in the Bay Area - Is the earthquake threat in the Bay Area real and imminent? Up to $80 billion in earthquake mitigation investments have been made since the Loma Prieta earthquake - are we safer?
