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|magnitude = 5.9 Mw |depth= |intensity=VIII - Severe |location= |countries affected = British America, Province of Massachusetts Bay |tsunami = |casualties = }} The 1755 Cape Ann earthquake took place off the coast of the British Province of Massachusetts Bay (present-day Massachusetts) on November 18. At between 6.0 and 6.3 on the Richter scale, it remains the largest earthquake in the history of Massachusetts. No one was killed, but it damaged hundreds of buildings in Boston and was felt as far north as Nova Scotia and as far south as South Carolina.〔Ballard C. Campbell, ed. ''American Disasters: 201 Calamities That Shook the Nation'' (2008) pp 28-30〕 Sailors on a ship more than offshore felt the quake, and mistook it at first for their ship running aground. Many residents of Boston and the surrounding areas attributed the quake to God, and it occasioned a brief increase in religious fervor in the city. Modern studies estimate that if a similar quake shook Boston today, it would result in as much as $5 billion in damage and hundreds of deaths.〔 It is possible that the Cape Ann earthquake may have been remotely triggered by a larger earthquake in Lisbon, Portugal a few weeks prior, although there is not enough evidence to prove that they are linked. ==Epicenter== The earthquake took place on November 18, 1755, at approximately 4:30 AM. Its epicenter is believed to have been offshore, approximately east of Cape Ann. The quake was felt as far north as Halifax, Nova Scotia, south to the Chesapeake Bay and South Carolina, and from Lake George and Lake Champlain in the northwest to a ship off the east coast.〔〔 Sailors on the ship reported that the quake was so strong, they had feared that they had run aground. The region experienced several aftershocks, the first of which was a little more than an hour after the quake. Most of these aftershocks could not be felt in Boston, affecting only the northeastern coast of the colony.〔 Modern research has estimated that the quake was between 6.0 and 6.3 on the Richter scale, and the United States Geological Survey lists it as the largest earthquake in the history of Massachusetts. Scientists are unclear on the causes of this and other quakes in the northeastern United States. There are a number of old faults in the region, but none of them are known to still be active.〔 It is possible that the Cape Ann earthquake may have been remotely triggered by a larger earthquake in Lisbon, Portugal a few weeks prior, although there is not enough evidence to prove that they are linked.〔 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「1755 Cape Ann earthquake」の詳細全文を読む スポンサード リンク
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