Unconsolidated lake bed sediments can (increase, decrease, or stop) the ground motion produced by an earthquake.
2006-07-18 03:50:49 · 3 answers · asked by trojanrhyme 1 in Science & Mathematics ➔ Earth Sciences & Geology
Increase! The more unconsolidated the material, the more amplified the seismic waves. That's what happened to the Marina district in San Fransisco in 1989. That area is built on old landfill material cleaned up after the 1906 earthquake, and that is why the most damage happened there.
2006-07-18 03:53:48 · answer #1 · answered by QFL 24-7 6 · 0⤊ 0⤋
Hmm...sounds like someone is trying to get the answer to their homework. I'd say unconsolidated lake bed sediments would Increase the ground motion produced by an earthquake. If you think about it, unconsolidated sediments are like sand or silt. When an earthquake hits, this sediment is easily movable and causes liquefaction to occur (when a saturated sand formation is turned into a liquid). If you want the textbook answer, regarding liquefaction in earthquakes, try looking it up on Wikipedia.
2006-07-18 04:04:38 · answer #2 · answered by sleekfeline 4 · 0⤊ 0⤋
increase (c'mon, increase!)
2006-07-18 03:53:29 · answer #3 · answered by anthonydavidpirtle 3 · 0⤊ 0⤋