Earthquake in Christchurch

Another 3.6 quake this morning

Christchurch warned to expect more aftershocks

Cantabrians should expect a series of aftershocks to follow last night's magnitude 4.6 quake.

Stuff,

20 January, 2013

The quake was the largest aftershock to hit the region since July of last year.

The 4.6 tremor (initally reported by Geonet as 4.7) struck at 9.15pm, and was centred 15km west of Christchurch, at a depth of 10km.

The shake was the strongest aftershock experienced in the region since a 4.8 quake on July 6, 2012.

GNS Science duty seismologist Mark Chadwick told Newstalk ZB the tremor was felt widely.

"I'd expect to see some aftershocks from this one.

"Probably in the magnitude 3 type range - they tend to last maybe a few more days (in terms of) aftershocks," he told Newstalk ZB.

The quake caused a flurry of online traffic that overloaded Geonet's website, and many took to social media to comment.

A Twitter user said, "Well that one got me out of my chair. I think I'm out of practice."

Another user outside of Christchurch tweeted, "That was a goodie Chch felt that in Ashburton - very out of practice. Heart just calming down."

There were no reports of damage or injury.

More quakes in Canterbury

Radio New Zealand,

20 January, 2013

Two earthquakes have struck near Methven in Canterbury on Sunday.

Both a 3.6 quake at 7.07am and a 3.0 tremor at 7.17am were at a relatively shallow depth of 5 kilometres.

On Saturday, a 4.6-magnitude quake, centred 15 kilometres south-west of Christchurch at a depth of 12 kilometres, hit at 9.15pm.

It was the strongest eartquake the region has felt this year. GeoNet spokesperson Mark Chadwick said aftershocks from were to be expected in the region in the coming days.

Earthquakes in the world on January 19, 2013 (M4.5 or more) – Moderate earthquake in Christchurch
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Moderate earthquake hits Christchurch, New Zealand

The quake with M 4,6 (GeoNet) hit the town this morning (UTC, 9:15 PM local time). USGS gives M 4,3 and a depth of 17 km for this quake. It was felt stongly in the whole town (basing on GeoNt felt reports) which was partly destroyed by a M 6,3 quake in February 2011. Today’s quake, which had its epicenter in the southern part of Christchurch, was the strongest aftershock for a couple of months. It was also felt in parts of New Zealands North Island. Even people report a strong shaking in many parts of he town, we do not expect any major damage in and around Christchurch.

SRC	Location	UTC Date/time	M	D	INFORMATION
ER	I Felt A (not Listed) Strong Earthquake	Jan 19 23:59 PM	4.6	0.1	MAP	I Felt It
EMSC	Antofagasta, Chile	Jan 19 19:20 PM	4.7	76.0	MAP	I Felt It
GEOFON	Northern Chile	Jan 19 19:20 PM	4.7	76.0	MAP	I Felt It
USGS	West Chile Rise	Jan 19 19:03 PM	4.7	16.2	MAP	I Felt It
EMSC	West Chile Rise	Jan 19 19:03 PM	4.7	100.0	MAP	I Felt It
EMSC	Carlsberg Ridge	Jan 19 16:58 PM	4.9	10.0	MAP	I Felt It
GEOFON	Carlsberg Ridge	Jan 19 16:58 PM	4.9	10.0	MAP	I Felt It
USGS	Carlsberg Ridge	Jan 19 16:58 PM	4.8	10.0	MAP	I Felt It
USGS	Near The East Coast Of The Kamchatka Peninsul	Jan 19 16:48 PM	4.6	82.8	MAP	I Felt It
GEOFON	Near East Coast Of Kamchatka	Jan 19 16:48 PM	4.6	58.0	MAP	I Felt It
EMSC	Near East Coast Of Kamchatka	Jan 19 16:48 PM	4.8	74.0	MAP	I Felt It
EMSC	Leyte, Philippines	Jan 19 13:48 PM	5.3	80.0	MAP	I Felt It
USGS	Samar, Philippines	Jan 19 13:48 PM	5.4	74.1	MAP	I Felt It
GEOFON	Samar, Philippines	Jan 19 13:48 PM	5.1	76.0	MAP	I Felt It
USGS	Kuril Islands	Jan 19 11:15 AM	4.6	58.5	MAP	I Felt It
EMSC	Kuril Islands	Jan 19 11:15 AM	4.6	60.0	MAP	I Felt It
GEOFON	Kuril Islands	Jan 19 11:15 AM	4.8	54.0	MAP	I Felt It
EMSC	Carlsberg Ridge	Jan 19 10:33 AM	4.7	10.0	MAP	I Felt It
GEOFON	Carlsberg Ridge	Jan 19 10:33 AM	4.7	10.0	MAP	I Felt It
EMSC	Eastern New Guinea Reg., P.n.g.	Jan 19 09:27 AM	4.9	100.0	MAP	I Felt It
USGS	Eastern New Guinea Region, Papua New Guinea	Jan 19 09:27 AM	4.6	89.9	MAP	I Felt It
GEOFON	Eastern New Guinea Reg., P.n.g.	Jan 19 09:27 AM	4.9	10.0	MAP	I Felt It
GEONET	Christchurch	Jan 19 08:15 AM	4.6	12.0	MAP	I Felt It
USGS	New Britain Region, Papua New Guinea	Jan 19 06:00 AM	4.9	22.3	MAP	I Felt It
EMSC	New Britain Region, P.n.g.	Jan 19 06:00 AM	5.0	20.0	MAP	I Felt It
GEOFON	New Britain Region, P.n.g.	Jan 19 06:00 AM	5.1	10.0	MAP	I Felt It
GEOFON	Chile-argentina Border Region	Jan 19 04:53 AM	4.6	217.0	MAP	I Felt It
EMSC	Jujuy, Argentina	Jan 19 04:53 AM	4.6	217.0	MAP	I Felt It
EMSC	South Of Fiji Islands	Jan 19 00:36 AM	4.8	142.0	MAP	I Felt It
GEOFON	South Of Fiji Islands	Jan 19 00:36 AM	4.8	142.0	MAP	I Felt It