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2021 Fukushima Earthquake
An intense and deadly seismic event struck offshore east of Tōhoku, Japan. The 7.3 or 7.1 earthquake occurred on a Saturday night at 23:07 JST (14:07 UTC) on 13 February at a focal depth of . It had a maximum JMA intensity of ''Shindo'' 6+ to ''Shindo'' 7 while on the Mercalli intensity scale, earned a rating of VIII (''Severe''). The earthquake was followed by multiple aftershocks within less than an hour, three of which registering magnitude 5.3. The earthquake itself has been considered an aftershock of the 2011 Tōhoku earthquake which had occurred almost ten years prior. The earthquake left three people dead, and at least 186 injured. It also inflicted significant structural damage across the Tōhoku and Kanto regions. This earthquake resulted in both insurance claims and losses exceeding ¥138billion (US$1.3billion). Small tsunami waves were also observed without any damage. Because of its proximity to the Fukushima Daiichi Nuclear Power Plant, the event provoked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peak Ground Acceleration
Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an wikt:accelerogram, accelerogram at a site during a particular earthquake. Earthquake shaking generally occurs in all three directions. Therefore, PGA is often split into the horizontal and vertical components. Horizontal PGAs are generally larger than those in the vertical direction but this is not always true, especially close to large earthquakes. PGA is an important parameter (also known as an intensity measure) for earthquake engineering, The design basis earthquake ground motion (DBEGM) is often defined in terms of PGA. Unlike the Richter magnitude scale, Richter and Moment magnitude scale, moment magnitude scales, it is not a measure of the total seismic scales#Magnitude and intensity, energy (magnitude, or size) of an earthquake, but rather of how hard the earth shake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
