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|mapsize = |date = 5 May 2011 |origintime = 08:24:08 (-05:00) |duration = ~1 minute〔 |magnitude = 5.7 Mw〔 〕 |depth = 24 km (14.9 mi) |location = |type = Interplate |countries affected = Mexico |damage = Minimal |intensity = MM VI |PGA = |tsunami = |landslide = |foreshocks = |aftershocks = 5 (≤4.1 ML) |casualties = None reported }} The 2011 Guerrero earthquake struck with a moment magnitude of 5.7 in southern Mexico at on Thursday, 5 May. It was positioned west of Ometepec, Guerrero, with a focal depth of 24 km (14.9 mi), and was lightly felt in many adjacent areas. Buildings swayed with the tremor in Mexico City, prompting evacuations and causing panic among many. Following the quake, police patrolled city streets for safety reasons and damage assessments were carried out across the affected region. There were no casualties, though two local police stations suffered slight damage. A number of light aftershocks succeeded the main event, of which the strongest measured a magnitude of 4.1 (ML). == Geology == The magnitude 5.7 (Mw) earthquake occurred inland near the southern coast of Mexico at a depth of 24 km (14.9 mi), with a duration of nearly one minute and an epicenter about 55 km (34 mi) west of Ometepec, Guerrero.〔〔 In the region, the Cocos, North American, and Caribbean Plates converge and create a tectonic zone of continuous seismic activity. The quake struck near the eastern periphery of the Guerrero seismic gap, which extends from Acapulco to Ixtapa–Zihuatanejo and contains enough seismic energy to generate an earthquake of up to magnitude 7.5, but it did not cause the gap to rupture. Initial estimates from the USGS placed its intensity at a magnitude of 5.8 (Mw); the National Seismological Service registered the earthquake at magnitude 5.5 (ML). Owing to the moderate magnitude of the quake, significant shaking was felt only in localized parts of Costa Chica, registering strongest at VI (strong) on the Mercalli scale in Azoyú and V (moderate) in populous areas around the epicenter.〔 Lighter ground motions (MM IV–III) were perceived in much of Guerrero, including Acapulco and Chilpancingo, with weak tremors (MM II) reported as far away as in Mexico City, about 300 km (187 mi) from the epicenter.〔 The capital city rests on a former lakebed of largely unconsolidated sedimentary layers, so earthquake shaking in its vicinity is generally amplified.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2011 Guerrero earthquake」の詳細全文を読む スポンサード リンク
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