USGS Earthquake Hazards Program (2008, May 12) M 7.9 - eastern Sichuan, China. NASA Earth Observatory (2008, May 21) Lake Formation in the Aftermath of Magnitude 7.9 Earthquake.NASA Earth Observatory (2008, June 11) Dam Breach Swells Jianjiang River.(2011) The Wenchuan Earthquake of 2008: Anatomy of a Disaster. AGU Blogosphere (2018) The Landslide Blog.“The two effects together mean that the lake will disappear over time.” Also, sediments that have eroded from the hills and channels are filling the lake. “This is the best-case scenario for this type of situation, releasing the water slowly and progressively with time,” Petley said. In the vicinity of this particular lake, erosion of the earthen dam is slowly lowering the lake level. The whole way that the environment is operating has changed.” Residents across a wide swath of Northeast Ohio. It is not just that buildings and infrastructure are damaged. CLEVELAND The United States Geological Survey reports a 4.0-magnitude earthquake was centered in Lake Erie, just north of Eastlake at 10:50 a.m. “This is the frequently forgotten effect of an earthquake. “The people have to deal with these effects, and they are profound and dangerous,” Petley said. And huge amounts of sediment were mobilized. The earthquake caused the kinds of changes to slopes and channels that can last for years or decades, according to Dave Petley of the University of Sheffield. These images were acquired before the start of the rainy season, so the image sequence likely represents the longer-term effects of an earthquake on the landscape. Water levels can fluctuate over the course of a year, especially after large rainfall events. The second image shows the same area on April 2, 2018, after water levels have lowered. The first image shows the lake on April 28, 2016, when water levels were still relatively high. The change is visible in this image pair, acquired with the Operational Land Imager (OLI) on Landsat 8. Ten years later, the lake’s water level has dropped. The earthen dams caused water levels to rise and spawned more than 20 “quake lakes.” A series of satellite images published in 2008 showed the growth of one such lake in Beichuan County, one of the most severely affected quake regions. The quake triggered deadly landslides, some of which blocked the flow of rivers. Sunday night, causing little to no structural damage in the immediate area, according to maps and data from the U.S. A 3.6 magnitude earthquake shook Northeastern Ohio at 10:43 p.m. On that day, a magnitude 7.9 temblor-known as the Great Sichuan or Wenchuan earthquake-caused destruction to areas near and far from the epicenter, about 80 kilometers west-northwest of Chengdu. Northeast Ohio shook by 3.6 magnitude earthquake Sunday night, could be felt in Akron. On May 12, 2008, the mountainous landscape of south-central China was profoundly changed.
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