Quake Watch 2011

ha ha good one Puterman

Still only that one quake for the 2nd July UTC ( was a typo error on my part was a 3.62 not a 3.9)

A few others between the Auckland one and that one have come through
2.009, 3538999, -40.72592, 176.8468, 2011/7/1 14:5:6, 28, o/s, South Madden Bank, SW of Cape Turnagain
2.546, 3539097, -39.88202, 175.16797, 2011/7/1 18:35:17, 28, 707 Longacre Rd, Okoia 4582
3.535, 3539098, -37.94632, 176.16309, 2011/7/1 18:36:2, 185, Lette Rd, Ngawaro 3188
3.057, 3539151, -39.01531, 176.32454, 2011/7/1 21:7:43, 81, 2046 Taharua Rd, Taharua 3379

The data base is following the Felt Quakes page exactly since 00:00:00 2011/7/2, I wonder if something needs to be reset on the Geonet program that feeds the search results to the web page, I've seen it go for a few days like that before and let them know by e-mail, they replied they didn't realise it wasn't working.
www.geonet.org.nz...
magma.geonet.org.nz...

Couple more off Castlepoint, NI yesterday 3rd July UTC

small E/Q NZ region

earthquake.usgs.gov...

MAG 4.9

2011/07/04

08:36:51 time UTC

-40.814 177.093

18.9 kms depth

OFF EAST COAST OF THE NORTH ISLAND, N.Z

seeya

reply to post by shaneR


Only a 4.9. Mm. Do you realise there have been NO mag 5.0+ quakes in over 24 hrs? I know I said it would be quiet after the 9.0, but not this quiet.

Here is the selection of LISS stations (PDF) I have as my home page. FLAT as a pancake! In fact the only one on it is the one you posted!!

I've got a rather puzzling observation.

If you look on Google Earth, with the quake apps in & running.
Then you look at the area around the Jaun de Fuka Plate, the Cascadia Subduction zone, and the Pacific Plate, taking a moment to scout the Ring of fire and all the quakes on it....

Doesn't it seem 'really strange' that the Jaun de Fuka Plate, and the Cascadia Subduction zone, show virtually no activity at all?

Every time I look at the region, (daily) there doesn't seem to be any quakes close to the faults there.
An' yet there is a great deal of activity else where on the Pacific Plate.

Considering the area is known for prior large quakes (8.0+.) and Tsunamis, I find it troubling that there isn't any indications of quakes there. It's like the rest of the plate/ring of fire is moving and adjusting to the Japan 9.1, but that region seems stuck.

While I am hesitant to float this hypothesis; I'm thinking that we'll see a few more 7/8's on the far ends of Ring of Fire, not just near Japan. After which, in say 2-3 months we'd see the Cascadia Subduction go off in a big way.

I really hope I'm wrong.

M.

So there you all are , ATS was off line last night

As it happens, more quakes for July 1, 2 & 3 came onto the database at Geonet Monday morning, thats the trouble with lack of funding, its not a 24/7 operation, just 9-5/5 days a week unless something big happens and the on duty seismologist logs in from home and brings up the info to make the web pages.

Not surprised about that 5.039ML quake off the Manawatu Coast, its been building there for 30 days, and its an active subduction zone anyway.
Pretty close to the 4.4 the day before, interesting how the aftershocks trend towards land suggesting indeed the Pacific Plate slid down under the Australian Plate at that point.

Heres a couple of maps of
Top:30 days prior
Lower: 04.07.2011

7 of those on the lower map are aftershocks (so far)
MAG, REF, LAT, LONG, UTC, DEPTH
5.039, 3540318, -40.7937, 177.01675, 2011/7/4 8:36:51, 12
4.198, 3540343, -40.66827, 176.84964, 2011/7/4 10:2:46, 33
3.146, 3540353, -40.65953, 176.79208, 2011/7/4 10:26:48, 33
3.017, 3540356, -40.62425, 176.80817, 2011/7/4 10:34:50, 28
2.19, 3540357, -40.58326, 176.78969, 2011/7/4 10:38:59, 27
3.51, 3540358, -40.65932, 176.88179, 2011/7/4 10:43:17, 42
3.075, 3540359, -40.6969, 176.87828, 2011/7/4 10:45:19, 25
3.248, 3540360, -40.63367, 176.83498, 2011/7/4 10:47:6, 27

But then again it could just be a bigger one in an ongoing swarm, depends how you look at it

I noticed that Porangahau has been 'busy' recently. Makes a pleasant change from Christchurch where (thankfully) I haven't felt a shake for a few days. While the quiescence is lovely, people are still on edge...you can see it in their eyes!

reply to post by Moshpet


There seem to be a few in the usual place and possibly more than usual along the line of volcanoes. In terms of earthquakes in the area 40N-45N, 132.5W-123.5W the activity has been quieter earlier in the year.



Bear in mind also that Alaska has done a little stress relieving with the 7.2

Ok, I felt this one. It's about 30 miles south of me. And if it gets erased, I'm gonna blow a gasket.

Earthquake Details

This is a computer-generated message -- this event has not yet been reviewed by a seismologist.
Magnitude 3.2
Date-Time Tuesday, July 05, 2011 at 03:22:06 UTC
Monday, July 04, 2011 at 09:22:06 PM at epicenter

Location 39.932°N, 111.816°W
Depth 1.3 km (~0.8 mile) (poorly constrained)
Region UTAH
Distances 1 km (1 miles) NE (49°) from Rocky Ridge, UT
5 km (3 miles) SSW (210°) from Santaquin, UT
7 km (4 miles) SSE (166°) from Genola, UT
37 km (23 miles) SSW (201°) from Provo, UT
92 km (57 miles) S (176°) from Salt Lake City, UT

Location Uncertainty horizontal +/- 0.5 km (0.3 miles); depth +/- 4.3 km (2.7 miles)
Parameters NST= 62, Nph= 62, Dmin=5 km, Rmss=0.39 sec, Gp= 54°,
M-type=local magnitude (ML), Version=1
Source University of Utah Seismograph Stations

Event ID uu00007441

Source - USGS


Yesterday we had a 2.7 in the same place. Then an hour later, the USGS downgraded it to a 1.7. Then another hour later, they outright deleted it!

A 6.5 has just struck 30km west of Taupo on the North Island of New Zealand

150km in Depth




www.geonet.org.nz...

Originally posted by MoorfNZ
A 6.5 has just struck 30km west of Taupo on the North Island of New Zealand

150km in Depth

www.geonet.org.nz...

edit on 4-7-2011 by MoorfNZ because: (no reason given)

And the USGS has it listed as a 5.3. Go figure.

Earthquake Details

This event has been reviewed by a seismologist.
Magnitude 5.3
Date-Time Tuesday, July 05, 2011 at 03:36:25 UTC
Tuesday, July 05, 2011 at 03:36:25 PM at epicenter
Time of Earthquake in other Time Zones

Location 38.597°S, 175.688°E
Depth 161.3 km (100.2 miles)
Region NORTH ISLAND OF NEW ZEALAND
Distances 69 km (42 miles) SW of Rotorua, New Zealand
144 km (89 miles) NW of Napier, New Zealand
209 km (129 miles) SSE of Auckland, New Zealand
310 km (192 miles) NNE of WELLINGTON, New Zealand

Location Uncertainty horizontal +/- 14 km (8.7 miles); depth +/- 6.1 km (3.8 miles)
Parameters NST=139, Nph=148, Dmin=73.5 km, Rmss=1.66 sec, Gp= 47°,
M-type=body wave magnitude (Mb), Version=7
Source USGS NEIC (WDCS-D)


Event ID usc0004n71ex]

Source - USGS

There was a 3.7 off the coast of San Diego today at a depth of 0 km. is this a rarity?

Originally posted by radpetey
There was a 3.7 off the coast of San Diego today at a depth of 0 km. is this a rarity?

Not sure that this is going to answer your question. But it's what the USGS has up on their site. Hopefully we can get a REAL answer from PuterMan or someone.

Q: What does it mean that the earthquake occurred at a depth of 0 km?

A: An earthquake cannot occur at depth of 0 km. In order for an earthquake to occur, two blocks of crust must slip past one another, and it is physically impossible for this to happen at the surface of the earth. So why do we report that the earthquake occured at a depth of 0 km sometimes? Sometimes it is simply a very shallow event with poor depth resolution, but more often it is not actually an earthquake, but a quarry blast. These explosions are recorded by the seismic network and located by the software. When they are reviewed by a seismic analyst, they are labeled as a quarry blast in the earthquake catalog.

Source - USGS FAQ

I saw that Moorfnz. 150 km depth so hopefully those up there won't have experienced bad shaking such as we had with our mag. 6+

Also, three shallow ones in Arthurs Pass, very close to each other: quake.crowe.co.nz...

reply to post by aorAki


Was bobbing up and down on my chair here in inland Canterbury!! I thought was a big one in Christchurch.

Saw those three up at Arthur's - near Mt White fault !

Well I had a howling dog and a very worried cat when that Taupo quake hit....it was reasonably gentle but looooong. I am in the Manawatu NZ . If there is anything that has EVER worried me about earthquakes in NZ it is a the big one in Taupo. With the volcano involved.

ETA: 2 1/2 hrs after the quake I have my big pooch ( he is 55kg ) laying on the floor emitting low growls every few seconds. Never done that before. I totally believe he is sensing something I cant.

reply to post by annella


Sounds like it was less to do with the volcanic zone and more to do with the Hikurangi subduction zone, hence felt more on east of both islands.

Volcanologist Brad Scott said although the earthquake was centred near Taupo it was more likely felt on the east coast of both islands. There had been reports of it being broadly felt along the east coast in Hawke's Bay and Wairarapa, but not in Taupo, he said. Scott said the earthquake was below the plate boundary, and the volcanic zone of the central North Island would have absorbed much of the energy.

www.stuff.co.nz...

reply to post by annella


As we witnessed in Sumatra's giant tsunami; the animals got the h#@% out of dodge.

Henceforth, one would be wise to monitor there animals out of the ordinary behavior when living in areas that are prone to disaster

Originally posted by PuterMan
reply to post by Moshpet

 

There seem to be a few in the usual place and possibly more than usual along the line of volcanoes. In terms of earthquakes in the area 40N-45N, 132.5W-123.5W the activity has been quieter earlier in the year.



Bear in mind also that Alaska has done a little stress relieving with the 7.2

Thanks for the chart PuterMan.

Maybe I'm jumping at shadows, (always a possibility....)

I just found it odd from the perspective where-in there are daily quakes that pretty much lighting up the Ring of Fire above and below that section. It could be that I'm looking too hard, but I think that section is just too quiet for all the rest of the activity on the ring. (Or my pet theory is bollux and I'm reaching too hard/far.)

Another place I'm watching is over by Kylyucevska Sopka (Russian Straoto-Volcano) which is not far (relatively speaking) from a triple junction.

All in all I'm likely jumping at shadow and or my spidey-sense is borked.

Again, thanks for the chart.

M.

We just had a 4.4 Victoria Aust, i live near the epicenter,heres a news article.
www.abc.net.au...

reply to post by MoorfNZ

Surprisingly I didn't feel that one (although there were hundreds of reports from Wellington) despite actually being 12ft IN the ground working on a retaining wall on a hill cutting.

Well that just about completes the Subduction phase , unless there is a deeper one yet to come for Taranaki.

Another map and graph, extending that dashed line from this mornings image, across the Island to Taupo.
Have seen this in action also drawing a line across to the same location from offshore Gisborne.