Quake Watch 2010

reply to post by MoorfNZ


78 events over 1.0+ in the last 365 days.

Max magnitude 3.7 on 1st July 2009.

Cummulative over past 365 days



Magnitude over past 78 events



[edit on 25/5/2010 by PuterMan]

Great responses as usual - thanks guys....

So it's active but nothing usually much above 2.5...

..

[edit on 25-5-2010 by MoorfNZ]

Reference Number 3313020/G
Universal Time May 26 2010 at 2:04
NZ Standard Time Wednesday, May 26 2010 at 2:04 pm
Latitude, Longitude 43.38°S, 172.52°E
Focal Depth 12 km
Richter magnitude 3.0 (2.959ML)
Region Canterbury, New Zealand
Location

* 10 km south-west of Rangiora
* 10 km west of Kaiapoi
* 20 km north-west of Christchurch

Felt in the Canterbury region.

and

REF, LAT, LONG, DATE/TIME UTC, DEPTH, MAG, LOCATION
3312546, -38.10671, 177.67253, 2010/5/25 4:58:17.87284, 5, 3.475, Takaputahi River, BOP
3312765, -38.44337, 178.92871, 2010/5/25 15:0:.70213, 27.4708, 3.111, o/s Hikurangi Trough, E of Pakarae, East Cape
3312804, -39.83531, 176.97447, 2010/5/25 16:42:19.54117, 49.3887, 3.058, SW of Waimarama, Hawkes Bay
3312840, -39.10038, 176.23994, 2010/5/25 18:15:29.16808, 63.1355, 3.222, SE of Mohaka River, Hawkes Bay
3312853, -40.71313, 173.53961, 2010/5/25 18:41:53.17252, 140.2748, 3.454, o/s Tasman Bay, W of D’Urville Is.
3312931, -44.60482, 168.11989, 2010/5/25 22:0:4.28967, 90.3821, 3.517, Hollyford Valley, Fiordland
3312935, -41.73079, 174.12398, 2010/5/25 22:10:21.66683, 39.3855, 3.688, W of Lake Grassmere, Marlborough





[edit on 26-5-2010 by muzzy]

reply to post by MoorfNZ



Another article on the same subject.

Earlier estimates put the chance of such quakes at just once every 500 years. But new analyses by Oregon State University marine geologist Chris Goldfinger and his colleagues have revealed a more complex picture of the Cascadia Subduction zone, where the ocean floor steadily slips below the North American Plate – and where the region's earthquakes originate.

They found that Cascadia represents at least four separate segments, rather than one big subduction zone. Mega-quakes of magnitude-9 or greater occur less frequently in the northern segment and can rupture the entire fault, even as magnitude-8 earthquakes strike more often in the southern segment.

"It is not a question of if a major earthquake will strike, it is a matter of when," Goldfinger said, "And the 'when' is looking like it may not be that far in the future."

This article went into a little more detail in helping me understand the information being presented, as I don't know much of the science behind earthquakes as many. Regardless, I thought it was a good read.

Nothing unusual about this location, but it's a relatively big one so I'm listing it...

Magnitude 6.4 SOUTHEAST OF THE RYUKYU ISLANDS

Date-Time

* Wednesday, May 26, 2010 at 08:53:06 UTC
* Wednesday, May 26, 2010 at 05:53:06 PM at epicenter

Location 25.767°N, 130.027°E
Depth 4.2 km (2.6 miles) (poorly constrained)
Region SOUTHEAST OF THE RYUKYU ISLANDS
Distances

* 240 km (149 miles) E (100°) from Naha, Okinawa, Japan
* 1336 km (830 miles) SSE (167°) from SEOUL, South Korea

[edit on 26-5-2010 by MoorfNZ]

Originally posted by MoorfNZ
Nothing unusual about this location, but it's a relatively big one so I'm listing it...

Magnitude 6.4 SOUTHEAST OF THE RYUKYU ISLANDS

Date-Time

* Wednesday, May 26, 2010 at 08:53:06 UTC
* Wednesday, May 26, 2010 at 05:53:06 PM at epicenter

Location 25.767°N, 130.027°E
Depth 4.2 km (2.6 miles) (poorly constrained)
Region SOUTHEAST OF THE RYUKYU ISLANDS
Distances

* 240 km (149 miles) E (100°) from Naha, Okinawa, Japan
* 1336 km (830 miles) SSE (167°) from SEOUL, South Korea

[edit on 26-5-2010 by MoorfNZ]

What are we only posting unusual quakes now?

Every quake has a character of its own, if you look closely enough you will find something unique.

Check the depth of that one 4.2km on your source, 10kmUSGS/NEIR, EMSC had it at 2km

thats very shallow for an offshore earthquake.

www.emsc-csem.org...

There was a 5.0 aftershock 3 hours later too.
www.emsc-csem.org...



[edit on 26-5-2010 by muzzy]

Reference Number 3313304/G
Universal Time May 26 2010 at 15:21
NZ Standard Time Thursday, May 27 2010 at 3:21 am
Latitude, Longitude 38.78°S, 175.65°E
Focal Depth 120 km
Richter magnitude 4.6
Region Taupo
Location

* 30 km north-west of Turangi
* 30 km east of Ongarue
* 40 km west of Taupo
* 230 km south of Auckland

www.geonet.org.nz...

significance?

Anything happening on the rim of the largest dormant volcano caldera in the South Pacific is significant as far as I am concerned. 4.6ML is getting up there.
www.gns.cri.nz...
Alert Status
www.geonet.org.nz...


[edit on 26-5-2010 by muzzy]

Originally posted by muzzy

Originally posted by MoorfNZ
Nothing unusual about this location, but it's a relatively big one so I'm listing it...

Magnitude 6.4 SOUTHEAST OF THE RYUKYU ISLANDS

Date-Time

* Wednesday, May 26, 2010 at 08:53:06 UTC
* Wednesday, May 26, 2010 at 05:53:06 PM at epicenter

Location 25.767°N, 130.027°E
Depth 4.2 km (2.6 miles) (poorly constrained)
Region SOUTHEAST OF THE RYUKYU ISLANDS
Distances

* 240 km (149 miles) E (100°) from Naha, Okinawa, Japan
* 1336 km (830 miles) SSE (167°) from SEOUL, South Korea

[edit on 26-5-2010 by MoorfNZ]

What are we only posting unusual quakes now?

Every quake has a character of its own, if you look closely enough you will find something unique.

Check the depth of that one 4.2km on your source, 10kmUSGS/NEIR, EMSC had it at 2km

thats very shallow for an offshore earthquake.

www.emsc-csem.org...⊂=detail&id=170485

There was a 5.0 aftershock 3 hours later too.
www.emsc-csem.org...⊂=detail&id=170524



[edit on 26-5-2010 by muzzy]

Fed up with every report being made being picked apart - I like watching, I'll stick to that and let all the experts post what they feel is a decent contribution....

[edit on 26-5-2010 by MoorfNZ]

reply to post by MoorfNZ


Hey, Don't even go there!!!!! You do a super fine job here!!!! Don't let the nit picker's get you down!!! - let them roll off your back!!! - WE ARE THE QUAKE WATCHER'S - AND YOU ARE ONE OF THEM!!!

reply to post by MoorfNZ


Screw the nit pickers.. I have learned a lot from everyone that posts in this thread, and can personally say that you are one of those that I have learned a lot from.

I wish everyone would just skim through the very few posts that are made here.. take what they will and leave the rest for everyone to do the same. This thread is much better than having 20 new threads a day.

Don't let them get to ya. If they don't like what you post.. then let them deal with it.. they have the problem, not you.



What do I know though.. I'm just a watcher..

[edit on 26-5-2010 by broahes]

I'm not nit picking, jeez, I just made a comment back to yours that there was "nothing unusual" when there was! the depth/size ratio. if that quake had of been on land the earths surface would have been torn asunder, like the Edgecume quake of 1987.

This forum would be way more interesting if posters made more comments about theirs and the other posts.

reply to post by muzzy



Muzzy, we're all in this together.. I for myself, was only trying to encourage someone that adds to this thread to continue to. I didn't even pay attention to what he was commenting on, I was only encouraging him to continue posting here.

I learn a lot from ALL of you, and value everyone's posts equally.

More NZ,
REF, LAT, LONG, DATE/TIME UTC, DEPTH, MAG (ML), LOCATION
3313118, -40.85615, 175.51852, 2010/5/26 6:21:22.3, 27, 3.43, NW of Masterton, Wairarapa
3313212, -37.05388, -178.851, 2010/5/26 10:49:41.0, 33, 4.292, E of Kermadec Trench
3313236, -44.26843, 167.70944, 2010/5/26 12:3:41.4, 12, 3.183, o/s W of Big Bay, Fiordland
3313304, -38.77957, 175.64706, 2010/5/26 15:21:45.2, 115, 4.558, W of Lake Taupo
3313340, -38.40364, 176.26683, 2010/5/26 16:39:51.5, 102, 3.155, NW of Parekarangi, Waikato
3313411, -40.52155, 173.25339, 2010/5/26 20:19:4.7, 160, 3.286, NE of Farewell Spit, Golden Bay
3313455, -45.37847, 167.15129, 2010/5/26 22:11:55.0, 107, 3.122, W of Mataspina Reach, Doubtful Sound, Fiordland
3313483, -38.75922, 179.33183, 2010/5/26 23:28:10.5, 5, 3.234, o/s Gisborne Knolls
3313543, -39.55961, 177.43419, 2010/5/27 2:18:8.8, 33, 3.007, o/s NE of Cape Kidnappers, Hawkes Bay
3313545, -37.76172, 177.22887, 2010/5/27 2:26:23.0, 58, 3.411, o/s N of Opotiki, BOP
3313549, -45.79244, 166.85889, 2010/5/27 2:39:9.8, 74, 3.308, S of Cook Channel, Dusky Sound, Fiordland


magma.geonet.org.nz...



[edit on 27-5-2010 by muzzy]

reply to post by broahes


OK then

What you guys should do is ploting all these quakes in order on a map then connect the dots.

[edit on 27-5-2010 by exinterp]

Originally posted by muzzy

Originally posted by MoorfNZ
Nothing unusual about this location, but it's a relatively big one so I'm listing it...

Magnitude 6.4 SOUTHEAST OF THE RYUKYU ISLANDS

[edit on 26-5-2010 by MoorfNZ]

What are we only posting unusual quakes now?

Check the depth of that one 4.2km on your source, 10kmUSGS/NEIR, EMSC had it at 2km

thats very shallow for an offshore earthquake.

[edit on 26-5-2010 by muzzy]

Now stop fighting peeps! You are all correct in your own ways. That quake should be mentioned because it was over a six, but MoorfNZ is correct that there is actually nothing unusual about it, and there is absolutely no harm in making that comment especially for the benefit of those who read this thread and lurk, and may nor be aware that this is common in this area and nothing to get excited about.

Personally I suspect that the depth was undefined, just a 'standard' depth, especially since USGS use 10km and EMSC use 2km and their standards when the depth cannot be determined, but you have also to remember that this event was in 5250m depth of water. The pressure of that depth alone is a massive containment.

Of course Muzzy, every quake has it's own characteristics, but as we sort of agreed it would be useful to add comments about why a quake was significant rather than simply posting a list of quakes (that is NOT a dig at you)

The addition of comments helps us all learn a little more and, since some have specialist knowledge of an area such as yourself on NZ. We are here to learn and not fight amongst each other so behave or I'll belt ye wi' me shillelagh!

7.6 Vanuatu

Magnitude 7.6 (Preliminary magnitude — update expected within 15 minutes)
Date-Time

* Thursday, May 27, 2010 at 17:14:49 UTC
* Friday, May 28, 2010 at 04:14:49 AM at epicenter

Location 13.700°S, 166.500°E
Depth 20 km (12.4 miles) set by location program
Region VANUATU
Distances

* 215 km (134 miles) NNW (341°) from Santo (Luganville), Vanuatu
* 490 km (304 miles) NNW (337°) from PORT-VILA, Vanuatu
* 2077 km (1291 miles) NE (45°) from Brisbane, Australia

Location Uncertainty Error estimate not available
Parameters NST= 14, Nph= 14, Dmin=856.3 km, Rmss=0.9 sec, Gp= 61°,
M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=1
Source

* West Coast and Alaska Tsunami Warning Center/NOAA/NWS

Event ID at00498048

GE map does not work and nothing on the Tsunami warning site for the Pacific yet.

Details are coming through now. As far as I can see nearest landfall is about 50Km. This occurred in 3,600 m of water so may nor produce a tsumani despite the depth. 77 miles from the volcano that is playing up.

Down to a 7.2 now. Any more offers? Who'll give me 6.9?

[edit on 27/5/2010 by PuterMan]

A strong earthquake has occurred, but a tsunami IS NOT expected along the California, Oregon, Washington, British Columbia, or Alaska coast. NO tsunami warning, watch or advisory is in effect for these areas.

Based on the earthquake magnitude, location and historic tsunami records, a damaging tsunami IS NOT expected along the California, Oregon, Washington, British Columbia, and Alaska coasts. At coastal locations which have experienced strong ground shaking, local tsunamis are possible due to underwater landslides.
Source

Well that's good.

It is likely that a tsunami was generated. The maximum tsunami wave height near the coast of Pek will be 0.21m.

Caution: this information is based on risk models.

www.gdacs.org...

Originally posted by exinterp
What you guys should do is ploting all these quakes in order on a map then connect the dots.

[edit on 27-5-2010 by exinterp]

I prefer maps to lists and text myself too exinterp, but the way this ATS is set up its hard work putting jpgs on the actual page, you have to use the ATS Albums section under member tools, need about 3 windows open to be able to do it. Just putting on a link doesn't have the same effect IMO.

This is about the best I can do via google maps, I like to be able to have the text info popup tag about the quake come up when you click on a dot/orb/marker. I only found this map function a few weeks ago, still learning how it works.

You can zoom in and out and see clusters of quakes in various places.

Heres one of all the 3+ mag quakes in New Zealand May 1 - May 27th

Join the dots if you want , there are 279 of them

Let me know how/if it works for you, I could do this instead of the "boring" lists

Map


On the map you can see all the quakes I have previously listed here in May as text.
Of interest to me this month was the Whale Island Swarm, The Ngatoro Basin Swarm, the 4.56ML off of Northland, the 3 quakes along the Chatham Rise (out to the right of NZ on the satellite version) and the Takaputahi River, Bay of Plenty events which started out as a 4.56 with a few aftershocks and now seems to becoming a Swarm over a longer period (there are quite a few 2's there as well)

[edit on 27-5-2010 by muzzy]