Quake Watch 2011

reply to post by muzzy

Aren't those islands volcanic? Do you think they are volcano related?
I have a vague recollection that there were grumbles around there not so long ago. (Forgive me, my memory is getting really bad).

reply to post by zenius


Most definitely volcanic

You can see those quake on this graph from Bud Explorer
www.iris.edu...

The Red one is the Kermadec quake 5.7-6.1

The Bay of Plenty is a Spreading Zone all the way up to the Havre Trough, so I think all these (incl the Kerm quake) are related to the same thing - spreading of the crust.

couple of micros at Mt Ruapehu volcano as well today

and one at Waimangu, Lake Rotomahana (near Tarawera Volcano)
a very volcanic day

reply to post by muzzy


I thought it would go further north than Havre Trough and Pacific plate subduction would play a large part in it too. But I haven't looked closely at it. The Samoa/Tonga/Vanuatu movements must surely affect it too?

reply to post by zenius


maybe it does,but this is where the subduction theory falls down, if that area between the Kermadec Ridge and the Colville Ridge ( the next string of ridges to the west) is spreading then that means the Australian Plate is expanding eastwards OVER the Pacific Plate, rather than the PP going UNDER the AP

maybe a bit of both

reply to post by muzzy


Hmm, interesting theory. I hadn't thought of that.
Now you're getting my brain ticking....

reply to post by muzzy


Subduction falls down all over the place!

Kermadec PDF files now available

usc0003kw5-kermadec on QVS
Details from the blog page as PDF
USGS PAGER PDF file

Just felt a quake 4 minutes ago, just one shake, felt like a smallish 4
Been a while since we had one here.
Made me jump


Here it is

Reference Number 3517053
Universal Time May 22 2011 at 1:25
NZ Standard Time Sunday, May 22 2011 at 1:25 pm
Latitude, Longitude 40.42°S, 175.09°E
Focal Depth 30 km
Richter magnitude 3.9
Region Manawatu
Location
20 km west of Foxton
30 km north-west of Levin
100 km north of Wellington
www.geonet.org.nz...

I filled in a report!, Not sure if they gave me a MM 3 or 4 for that, 3 reports from Raumati Beach

reply to post by PuterMan


Yeh yeh, bah to subduction!
So it's a 6.2 now? Couldn't read the pdf with the long strip down the middle btw.

@ muzzy, hope there are none bigger heading your way!

M5.0 just hit Taiwan 6.3 miles depth

earthquake.usgs.gov...

Magnitude
5.0
Date-Time
Sunday, May 22, 2011 at 01:34:13 UTC
Sunday, May 22, 2011 at 09:34:13 AM at epicenter
Time of Earthquake in other Time Zones
Location
24.116°N, 121.781°E
Depth
10.2 km (6.3 miles)
Region
TAIWAN
Distances
23 km (14 miles) NE of Hualien, Taiwan
53 km (32 miles) S of Su'ao, Taiwan
105 km (65 miles) SSE of TAIPEI, Taiwan
1056 km (656 miles) N of MANILA, Philippines
Location Uncertainty
horizontal +/- 11.3 km (7.0 miles); depth +/- 4.2 km (2.6 miles)
Parameters
NST= 97, Nph= 97, Dmin=20 km, Rmss=0.92 sec, Gp= 76°,
M-type=body wave magnitude (Mb), Version=6
Source
USGS NEIC (WDCS-D)
Event ID
usc0003l12

reply to post by zenius

Couldn't read the pdf with the long strip down the middle btw.

Can you explain? I have these as long one page ones so as not to cut across image but if that does not work i need to know. What are you using? Adobe?

So it's a 6.2 now?

I must have been I guess but the main page says 6.1

The trouble is they never change the subsidiary pages after the event. They are generated once and that it it. Pretty poor really.

yes bah to subduction

Indeed but subduction always falls down - pun (OK very bad one)

reply to post by PuterMan


Oh Sorry PM, I didn't stretch to frame. haven't slept, sick child, not thinking. It was the blog pdf, but no it's fine.
2nd

anyone have the stats for the last years?

reply to post by grinitagi


Um how many years and where on the planet:?

line 2

I felt this!!! Slight shaking


Magnitude
3.6
Date-Time
Sunday, May 22, 2011 at 02:04:56 UTC
Saturday, May 21, 2011 at 07:04:56 PM at epicenter
Time of Earthquake in other Time Zones
Location
37.981°N, 122.249°W
Depth
9.6 km (6.0 miles)
Region
SAN FRANCISCO BAY AREA, CALIFORNIA
Distances
3 km (2 miles) SSE (164°) from Hercules, CA
4 km (3 miles) ENE (71°) from El Sobrante, CA
4 km (3 miles) ESE (116°) from Pinole, CA
12 km (8 miles) N (10°) from Berkeley, CA
15 km (9 miles) S (185°) from Vallejo, CA
21 km (13 miles) N (355°) from Oakland, CA
Location Uncertainty
horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles)
Parameters
Nph= 94, Dmin=3 km, Rmss=0.19 sec, Gp= 43°,
M-type=local magnitude (ML), Version=3
Source
California Integrated Seismic Net:
USGS Caltech CGS UCB UCSD UNR
Event ID
nc71573330

earthquake.usgs.gov...

PuterMan... I saw in a post the other day, Robin mentioned something about your thoughts/opinions on subduction zones. I'm really curious to know what they are.

If you wouldn't mind sharing, or pointing to a previous post of yours that has those thoughts, I would greatly appreciate it!

I think I felt a small tremor at about 0230 am. Don't live near a highway, so no big trucks, and this is a small town so I would have heard anything big enough to shake my house. I live in Central Illinois, Clark County.

reply to post by zenius


there was another one later, Mag 3.0 at 7:04pm NZST, 8.78km south west of us, offshore Paekakariki, didn't feel it though.
Mag, Lat, Long, Date/Time UTC, Depth
3.0, 3517168,-40.96479,174.90576, 2011/5/22, 07:04:40, 30

I've been keeping a very close eye on the Juan de Fuca fault and the Mendocino Triple Junction (off Eureka California). Small quakes have been working their way up the San Andreas over the last month, seems higher than normal and increasing in a northerly trend but I haven't compared long-term numbers. But, here's what I've noticed, there have been NO quakes above a 1.9 in the last month or so north of Eureka.... until today (last 24 hours)!

Last week we got several quakes at the north end of the Juan de Fuca fault complex, in Canada, and now today this (pictured below), a 3.1 and a 4.6 out in the Ocean, right on the Juan de Fuca! Reasonably small but certainly in a trend saying we may have a big one there soon!



I've been following this because of a prediction saying a 7.9 would occur right at the Mendocino Triple Junction. It's predicted for May 26th, 2011 - details in 7.9 Earthquake in California predicted by proven and validated SOURCE * lead-in to volcanic activity. It's based on channeling so please make any comments on that thread concerning non-earthquake stuff.

anyone else following this area or have thoughts on the quakes on the Juan de Fuca?

Scientists find odd twist in slow 'earthquakes': Tremor running backwards

www.eurekalert.org...

earthquakes jolt Phl

www.philstar.com...

Just picked this one up on downloading latest quakes off Geonet, can't believe no one reported feeling it given the shallow depth and the location 10km east of Wairakei, and 15km north east of Taupo township, Waikato .
Just after noon NZST.
Mag, Ref, Lat, Long, Date/Time UTC, Depth
4.741ML, 3517544, -38.61735, 176.22408, 2011/5/23 00:59:27, 2.4km

there was a Mag 4 under Lake Rotorua ( old crater lake ) 34 minutes prior, which at 159km depth you can understand no one feeling it.
Mag, Ref, Lat, Long, Date/Time UTC, Depth
3.968ML, 3517530, -38.0583, 176.30185, 2011/5/23 00:25:34, 159km

magma.geonet.org.nz...

Lot of quakes in volcanic areas the last couple of days