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Map of Japan showing the distribution of maximum JMA Seismic Intensities by prefecture for the 2011 Tōhoku Earthquake. The JMA intensity scale differs from magnitude measurements like the moment magnitude (Mw) and the earlier Richter scales, which represent how much energy an earthquake releases. Similar to the Mercalli scale, the JMA scale ...
UTC time: 2011-04-11 08:16:12: ISC event: 16416735: USGS-ANSSComCat: Local date: 11 April 2011: Local time: 17:16 JST: Magnitude: 6.6 M w [1]: Depth: 13 km (8 mi) Epicenter: 1]: Type: Dip-slip: Areas affected: Japan: Max. intensity: MMI VIII (Severe) JMA 6−: Peak acceleration: 2.11 g 2071.7 Gal: Tsunami: No: Landslides: Yes: Casualties: 4 dead, 10 injured: A potent magnitude 6.6 M w ...
It may have been a triggered earthquake caused by the Tohoku earthquake, which occurred four days earlier, on 11 March 2011. [7] [8] It was sinistral strike-slip fault earthquake. [9] It had a maximum JMA intensity of Shindo 6+ (Fujinomiya [10]) or VIII (Severe) on the Mercalli intensity scale. [11]
The Modified Mercalli intensity scale (MM, MMI, or MCS) measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake. Magnitude scales measure the inherent force or strength of an earthquake – an event occurring at greater or lesser depth.
In Japan, the Shindo scale is commonly used to measure earthquakes by seismic intensity instead of magnitude. This is similar to the Modified Mercalli intensity scale used in the United States or the Liedu scale used in China, meaning that the scale measures the intensity of an earthquake at a given location instead of measuring the energy an earthquake releases at its epicenter (its magnitude ...
A seismogram recorded in Massachusetts, United States. The magnitude 9.1 (M w) undersea megathrust earthquake occurred on 11 March 2011 at 14:46 JST (05:46 UTC) in the north-western Pacific Ocean at a relatively shallow depth of 32 km (20 mi), [9] [56] with its epicenter approximately 72 km (45 mi) east of the Oshika Peninsula of Tōhoku, Japan, lasting approximately six minutes.
The Fukushima I Nuclear Power Plant was severely damaged after a large earthquake followed by a tsunami in 2011, causing a nuclear event of level 7, the highest on the scale. Shortly after the 2011 Tōhoku earthquake, new reports were released which indicated the significant likelihood of another magnitude 9 earthquake occurring elsewhere in ...
That gave the Mercalli Scale, as well as the European MSK-64 scale that followed, a quantitative element representing the vulnerability of the building's type. [10] Since then, that scale has been called the Modified Mercalli intensity scale (MMS) and the evaluations of the seismic intensities are more reliable. [11]