ruaumoko: 1942 -1969 Sth Lake Taupo/Tongariro quakes

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1942 -1969 Sth Lake Taupo/Tongariro quakes

From 1940 to 1969 there were only two earthquakes within the study/search area of Rotoaira/Rotopounamu
REF, LAT, LONG, TIME, DEPTH, MAG
1542420, -39.02, 175.77, 1943/11/24 14:28:35.0, 115, 4.25
1549534, -39.02, 175.78, 1967/04/10 14:36:26.3, 12, 3.033, FELT
(These are shown on the map below within the shaded study area)

Otherwise during the same period there were within a 15km radius of Mt Tihia some 25 events 4.0 to 5.3Ml. (Only the magnitude 5+ are tagged on the map.)

minor to moderate quakes south lake taupo/ tongariro area 1942-1969

minor to moderate quakes south lake taupo/ tongariro area 1942-1969

REF, LAT, LONG, TIME, DEPTH, MAG
1585334, -39, 175.75, 1942/04/30 09:09:42.4, 12, 4
1585337, -39.09, 175.77, 1942/05/08 04:12:22.3, 12, 4.267
1542438, -39.02, 175.81, 1944/01/10 04:39:15.0, 12, 4.633
1542569, -38.95, 175.69, 1944/10/26 21:29:36.5, 163, 4.85
1542698, -39, 175.7, 1945/10/12 04:18:38.9, 12, 4.2
1542848, -38.98, 175.78, 1946/06/28 11:50:20.0, 12, 4.333
1542942, -39.09, 175.82, 1946/12/14 22:17:07.7, 12, 4.533
1543234, -38.94, 175.77, 1948/01/26 11:54:01.4, 121, 4.75
1543518, -39.02, 175.82, 1949/05/17 02:11:06.2, 125, 4.6
1543547, -38.95, 175.84, 1949/06/24 22:14:19.9, 168, 5.05
1543568, -38.95, 175.72, 1949/07/19 17:07:16.6, 182, 4.55
1543584, -38.95, 175.67, 1949/08/07 22:10:05.0, 182, 5.1
1543702, -38.91, 175.67, 1949/12/24 09:24:13.7, 160, 4.1
1543913, -38.89, 175.62, 1950/07/22 08:24:46.4, 12, 4.333
1544782, -39.07, 175.69, 1953/08/29 02:44:41.2, 112, 4.1
1545136, -38.96, 175.8, 1954/10/01 07:30:45.4, 65, 4.3
1545359, -38.83, 175.81, 1956/01/13 07:23:03.2, 139, 4.1
1545397, -38.95, 175.75, 1956/03/05 01:21:43.7, 12, 4.1
1545686, -38.94, 175.69, 1957/11/08 23:00:23.6, 128, 4.4
1545864, -39.08, 175.61, 1959/02/10 16:22:21.4, 118, 4.15
1545873, -39.07, 175.66, 1959/02/27 05:58:24.5, 126, 4.2
1546365, -38.93, 175.59, 1960/11/15 17:36:39.6, 207, 4.1
1547213, -38.96, 175.65, 1962/10/01 22:37:08.6, 12, 4
1549545, -38.98, 175.84, 1967/04/20 04:40:49.7, 12, 4.176
1549977, -38.98, 175.77, 1968/01/30 05:38:54.2, 12, 5.3

data by geonet. map 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.