ruaumoko: 1998 Rotoaira/Rotopounamu quakes

Saturday

1998 Rotoaira/Rotopounamu quakes

In 1998 there were 18 earthquakes in the Rotoaira/Rotopounamu area. There was a series of 4 micro quakes within 50 minutes on the 18th March west of Lake Rotoaira and south of Mangatipua Stream (shown on map as a pink coloured orbs) The largest and deepest quake in 1998 was a 3.746ML, 214km deep on the 26th June at 02:57:16 UTC under Mangatipua Stream 2km E of Otukou (shown on map as a purple coloured orb). Another deep quake, a 2.96ML, 154km deep, struck on the 27th January at 06:37:11.8 UTC WSW of Motuopuhi Island. (shown on map as a magenta coloured orb).

total 18 quakes Rotoaira/Rotopounamu area 1998

total 18 quakes Rotoaira/Rotopounamu area 1998

REF, LAT, LONG, TIME, DEPTH, MAG
1223199, -39.04008, 175.7076, 1998/01/01 21:27:51.7, 5, 2.074
1221759, -39.04977, 175.66832, 1998/01/04 21:55:33.1, 5, 1.581
1229538, -39.01683, 175.66895, 1998/01/21 23:29:59.3, 5, 1.576
1227886, -39.03475, 175.70341, 1998/01/27 06:37:11.8, 154, 2.96
1243408, -39.03874, 175.69421, 1998/03/12 08:19:52.4, 5, 1.13
1248212, -39.05026, 175.67963, 1998/03/18 02:49:51.0, 5, 1.413
1248213, -39.05017, 175.68246, 1998/03/18 03:26:57.8, 5, 1.797
1262259, -39.04921, 175.67245, 1998/03/18 03:27:05.1, 5, 2.016
1262260, -39.05591, 175.69035, 1998/03/18 03:38:52.9, 5, 1.398
1248239, -39.05941, 175.66362, 1998/03/22 05:49:37.7, 5, 1.078
1249998, -39.03293, 175.76743, 1998/03/24 09:19:02.9, 5, 1.73
1203040, -39.05705, 175.67653, 1998/03/27 01:54:05.4, 5, 2.328
1258758, -39.02758, 175.67015, 1998/04/10 20:23:16.5, 5, 1.404
1213976, -39.03918, 175.68039, 1998/04/10 20:23:57.7, 5, 1.269
1213977, -39.04248, 175.685, 1998/04/10 20:35:27.3, 5, 1.446
1241204, -39.04976, 175.7093, 1998/05/25 06:47:13.4, 5, 1.358
1261268, -39.03965, 175.67325, 1998/06/26 02:57:16.0, 214, 3.746
1271055, -39.02768, 175.78816, 1998/08/03 13:00:40.5, 5, 1.702

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

No comments:

Post a Comment

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.