Discover and read the best of Twitter Threads about #LomaPrieta

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Every year on October 17, we take a moment to reflect on the 1989 #LomaPrieta #earthquake. The 6.9-magnitude earthquake was one of the most powerful and costly quakes to shake the San Francisco Bay area since the 7.9-magnitude earthquake of 1906. (1/15)
The quake caused an estimated $6 billion in damage and, tragically, resulted in 63 deaths and 3,757 injuries.
Many of those casualties were due to failing infrastructure when sections of the Nimitz Freeway collapsed. (2/15)
Simpson @strongtie was founded in Oakland, California. Earthquakes were never far from the minds of our founders. It’s why even before Loma Prieta our mission was to provide solutions that help people design and build safer, stronger structures. (3/15)
Read 16 tweets
#ShakeAlert focuses on eq shaking which is controlled by 3 main factors: magnitude, distance from the rupturing fault, and local ground conditions. These factors play a role in how hard and for how long a region will shake. @IRIS_EPO video explains #USGSRemembers #LomaPrieta
@IRIS_EPO Generally, the closer to an earthquake the stronger the shaking you will feel. The Cypress St. viaduct along the Nimitz Freeway (I-880) was 55 miles away from the #LomaPrieta EQ. Why did the viaduct experience such heavy shaking, which caused its tragic collapse? (1/2) Image
During an earthquake, loose, soft soil will shake harder and longer than hard rock. Valleys will shake harder than mountains because of their sediment fill. Watch this video from @IRIS_EPO:…
#USGSRemembers (2/2)
Read 12 tweets

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