ruaumoko: Interim Events 2010 Feb 24th to May 14th Whale Island Area, BOP

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Interim Events 2010 Feb 24th to May 14th Whale Island Area, BOP

10 events 1.518ML to 3.28ML Feb 24th to May 14th 2010 UTC.
The 3.234ML event of 2nd April UTC located west of Coastlands was reported felt as;
MM5 Strong 8 Whakatane [8]
MM4 Largely observed 197 Awakeri [8], Coastlands [15], Edgecumbe [2], Kutarere [1], Ohope [22], Ohope Beach [1], Pahou [1], Paroa [4], Piripai [2], Poroporo [6], Port Ohope [1], Taneatua [2], Wainui [1], Whakatane [130], Whakatane Airport [1]
MM3 Weak 3 Opotiki [1], Taneatua [1], Whakatane [1]
Total reports 208.

REF, LAT, LONG, TIME, DEPTH, MAG
3266359, -37.87513, 176.96906, 2010/2/24 15:30:40.9, 5, 1.858
3273850, -37.9341, 176.89926, 2010/3/2 13:45:16.3, 5, 1.518
3280016, -37.9013, 176.88786, 2010/3/24 4:57:15.5, 5, 2.124
3282994, -37.85797, 176.98167, 2010/3/29 22:38:45.5, 5, 2.376
3284759, -37.93299, 176.96252, 2010/4/2 10:28:10.9, 2, 3.234
3286520, -37.78568, 176.85851, 2010/3/20 20:26:41.5, 5, 1.7
3295125, -37.88654, 177.06665, 2010/4/22 12:28:59.1, 65, 2.916
3296037, -37.9224, 176.88646, 2010/4/24 8:7:55.0, 5, 1.794
3303571, -37.80603, 176.89206, 2010/5/8 14:12:17.8, 96, 2.817
3306948, -37.84166, 176.9617, 2010/5/14 19:36:12.4, 5, 3.28

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data by geonet. maps by google maps. plots by highace using GPS Visualizer

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Earthquake Swarms

Earthquake swarms are events where a local area experiences sequences of many earthquakes striking in a relatively short period of time. The length of time used to define the swarm itself varies, but the United States Geological Survey points out that an event may be on the order of days, weeks, or months. They are differentiated from earthquakes succeeded by a series of aftershocks by the observation that no single earthquake in the sequence is obviously the main shock. Earthquake swarms are one of the events typically preceding eruptions of volcanoes

Earthquake Aftershocks

An aftershock is an earthquake that occurs after a previous earthquake (the main shock). An aftershock is in the same region of the main shock but is always of smaller magnitude strength. If an aftershock is larger than the main shock, the aftershock is redesignated as the main shock and the original main shock is redesignated as a foreshock. Aftershocks are smaller earthquakes formed as the crust around the displaced fault plane adjusts to the effects of the main shock

Aftershocks are dangerous because they are usually unpredictable, can be of a large magnitude, and can collapse buildings that are damaged from the mainshock. Bigger earthquakes have more and larger aftershocks and the sequences can last for years or even longer especially when a large event occurs in a seismically quiet area; see, for example, the New Madrid Seismic Zone, where events still follow Omori's law from the mainshocks of 1811–1812. An aftershock sequence is deemed to have ended when the rate of seismicity drops back to a background level; i.e., no further decay in the number of events with time can be detected.