Magnitude 4.1, Mon Dec 20 2021 4:43 PM


Location history for this earthquake. The automatic earthquake location system makes many locations for each quake. Not all quakes have a location history.

Magnitude History


0.01.02.03.04.05.0Magnitude0123Time since earthquake (minutes)Magnitude Historyb

The magnitude history for this event. The most recent value is shown as a larger circle and also labeled: c: caution, g: good b: best (reviewed by a duty person).

Depth History


02040Depth (km)0123Time since earthquake (minutes)Depth Historyb

The depth history for this event. The most recent value is shown as a larger circle and also labeled; c: caution, g: good b: best (reviewed by a duty person).

Origin History Map

Map of New Zealand.

Location History


Modification Time Quality Magnitude Depth Latitude Longitude
2021-12-20T03:47:37Z best 4.1 34.5 -38.89 177.44
2021-12-20T03:45:03Z preliminary 4.1 37.6 -38.90 177.45
2021-12-20T03:45:03Z preliminary 4.2 37.6 -38.90 177.45
2021-12-20T03:45:03Z automatic 4.2 47.9 -38.96 177.46
2021-12-20T03:45:01Z automatic 4.2 47.9 -38.96 177.46
2021-12-20T03:44:59Z automatic 4.1 47.9 -38.96 177.46
2021-12-20T03:44:59Z automatic 4.1 44.6 -38.93 177.45
2021-12-20T03:44:57Z automatic 4.0 44.6 -38.93 177.45
2021-12-20T03:44:57Z automatic 4.0 44.6 -38.93 177.45
2021-12-20T03:44:54Z automatic 4.1 44.6 -38.93 177.45
2021-12-20T03:44:54Z automatic 4.1 44.6 -38.93 177.45
2021-12-20T03:44:52Z automatic 4.0 44.6 -38.93 177.45
2021-12-20T03:44:51Z automatic 4.0 44.6 -38.93 177.45
2021-12-20T03:44:50Z automatic 3.6 44.6 -38.93 177.45
2021-12-20T03:44:49Z automatic 3.6 44.6 -38.93 177.45