Thursday, 28 February 2013

Volcanic eruption in Peru; earthquakes in NZ

Hundreds of quakes shake villages around smoking Peruvian volcano
Hundreds of small earthquakes have shaken the earth around the Sabancaya volcano in southern Peru over just a few days and the rumbling, along with plumes of smoke spewing up to 320 feet high, have put officials on alert to evacuate the area.



26 January, 2013


Peru's geological agency Ingemmet recorded some 536 quakes, about 20 an hour, on February 22 and 23 and periodic movement is ongoing.

Thousands of people live in the valleys surrounding the volcano. Some have already started to leave the region because the unusual seismic activity has damaged their homes. About 80 homes were damaged by one temblor on February 22, Peru's national defense office said.

The 20,000-foot (6,000-meter) volcano Sabancaya, which means "tongue of fire" in Quechua, has not had a significant eruption in nearly a decade. It sits atop the South America tectonic plate, which forces magma to the surface when it clashes with the neighboring Nazca plate.

Ingemmet said the volcano has been releasing huge smoke trails intermittently since January 15 and current seismic activity is similar to that which accompanied an eruption in 1986.

Sabancaya, active historically, was dormant for 200 years before erupting into activity several times in the 1980s and 1990s. No casualties were reported at that and the volcano has only experienced small eruptions since.

Southern Peru is the home to more than a dozen volcanoes.

Sabancaya is about 62 miles from the city of Arequipa, one of Peru's three largest cities, which was recently hit by heavy rains and flooding.

About 1.2 million people live in that city.



Unreported: Too many moderate relatively shallow earthquakes along the costs of New-Zealand


The last couple of weeks we saw numerous moderate earthquake (around Magnitude 5) at relatively shallow depths (5 to 50 km) below land or along the coasts of the North Island and South Island.

Today Geonet reported already 3 – 1 near Christchurch, 1 at Ruatoria and 1 in the Hokitika Greymouth area. Earlier similar earthquakes were reported near Mount Egmont and near Blenheim. 

Nothing really serious but all of them enough to scare people.


SRC
Location
UTC Date/time
M
D
INFORMATION
ER
I Felt A (not Listed) Strong Earthquake
Feb 27 23:59 PM
4.6
0
EMSC
Ryukyu Islands, Japan
Feb 27 23:37 PM
4.7
10
USGS
Ryukyu Islands, Japan
Feb 27 23:37 PM
4.7
11
GEOFON
Off Coast Of Oregon
Feb 27 22:25 PM
4.8
10
  • dallas oregon - a huge rumble that lasted a few seconds
EMSC
Off Coast Of Oregon
Feb 27 22:25 PM
5.2
40
USGS
Off The Coast Of Oregon
Feb 27 22:25 PM
5.1
9
GEOFON
Eastern Siberia, Russia
Feb 27 18:23 PM
4.6
10
EMSC
Northeastern Sakha, Russia
Feb 27 18:23 PM
4.6
40
USGS
Eastern New Guinea Region, Papua New Guinea
Feb 27 12:13 PM
4.6
127
GEOFON
Eastern New Guinea Reg., P.n.g.
Feb 27 12:13 PM
4.8
120
EMSC
Eastern New Guinea Reg., P.n.g.
Feb 27 12:13 PM
5.0
120
USGS
Bismarck Sea
Feb 27 12:01 PM
4.7
37
GEOFON
Bismarck Sea
Feb 27 12:01 PM
4.6
10
EMSC
Bismarck Sea
Feb 27 12:01 PM
4.6
2
GEOFON
Southeast Of Loyalty Islands
Feb 27 11:01 AM
4.8
116
USGS
Southeast Of The Loyalty Islands
Feb 27 11:01 AM
4.8
117
EMSC
Southeast Of Loyalty Islands
Feb 27 11:01 AM
4.8
109
GEOFON
Hokkaido, Japan Region
Feb 27 10:24 AM
4.7
67
USGS
Hokkaido, Japan Region
Feb 27 10:24 AM
4.6
73
EMSC
Hokkaido, Japan Region
Feb 27 10:24 AM
4.7
76
EMSC
Fiji Region
Feb 27 09:03 AM
4.8
671
GEOFON
Fiji Islands Region
Feb 27 09:03 AM
4.7
566
EMSC
Bismarck Sea
Feb 27 08:21 AM
4.6
10
USGS
Kermadec Islands Region
Feb 27 06:49 AM
5.1
31
EMSC
Kermadec Islands, New Zealand
Feb 27 06:49 AM
5.1
23
GEOFON
Kermadec Islands, New Zealand
Feb 27 06:49 AM
5.2
10
GEONET
Ruatoria
Feb 27 04:28 AM
4.9
26
GEOFON
Kermadec Islands Region
Feb 27 04:27 AM
5.1
46
USGS
Kermadec Islands, New Zealand
Feb 27 04:27 AM
4.8
12
EMSC
Kermadec Islands, New Zealand
Feb 27 04:27 AM
5.0
10

Data sources courtesy : USGS – EMSC – GFZ – GEONET (New Zealand only)
Earthquakes occurred yesterday (UTC time), but today local time

Near East Coast Of Kamchatka                                 M5.3 at 133 km depth

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