Quake Watch 2011

Magnitude
5.8
Date-Time
Saturday, April 16, 2011 at 02:19:24 UTC
Saturday, April 16, 2011 at 11:19:24 AM at epicenter
Time of Earthquake in other Time Zones
Location
36.411°N, 139.649°E
Depth
20.1 km (12.5 miles)
Region
EASTERN HONSHU, JAPAN
Distances
26 km (16 miles) SW of Utsunomiya, Honshu, Japan
52 km (32 miles) E of Maebashi, Honshu, Japan
74 km (45 miles) W of Mito, Honshu, Japan
81 km (50 miles) N of TOKYO, Japan
Location Uncertainty
horizontal +/- 14.9 km (9.3 miles); depth +/- 5.7 km (3.5 miles)
Parameters
NST=493, Nph=498, Dmin=692.4 km, Rmss=0.67 sec, Gp= 29°,
M-type=regional moment magnitude (Mw), Version=B
Source
USGS NEIC (WDCS-D)
Event ID
usc0002srs

neic.usgs.gov...

One in Australia...

This event has been reviewed by a seismologist.

Magnitude 5.2
Date-Time Saturday, April 16, 2011 at 05:31:19 UTC
Saturday, April 16, 2011 at 03:31:19 PM at epicenter

Location 20.034°S, 147.659°E
Depth 10 km (6.2 miles)
Region QUEENSLAND, AUSTRALIA
Distances 124 km (77 miles) SE (134°) from Townsville, Australia
400 km (248 miles) SSE (150°) from Cairns, Australia
1176 km (731 miles) S (178°) from PORT MORESBY, Papua New Guinea

Location Uncertainty horizontal +/- 17.4 km (10.8 miles); depth +/- 3.3 km (2.1 miles)
Parameters NST= 45, Nph= 49, Dmin=146.9 km, Rmss=0.92 sec, Gp= 76°,
M-type=body wave magnitude (Mb), Version=6
Source U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver

Event ID usc0002stu

USGS

Hmm, that's quite big for Oz...

JUST hit with another significant aftershock here in christchurch :-(

reply to post by MoorfNZ


Yes, very unusual. Not all that far from the 4.8 was it? a couple of months back. Still, yes big Qld.
...edit, a month ago today it was a 4 off the coast. About 300 km away this one was from the Innisfail one. For some reason I thought it was off the coast of Ayr. Not sure if there is mining out where this new one was.

Just had a huge aftershock here in Christchurch/Canterbury... not long after Oz's 5.2

Originally posted by MoorfNZ
Just had a huge aftershock here in Christchurch/Canterbury...

not long after Oz's 5.2

edit on 16-4-2011 by MoorfNZ because: (no reason given)

Keeping an eye open but I haven't seen anything on the USGS servers for that one.

Hmm..

reply to post by MoorfNZ


So yours was a 5.2 also....

* This event has been reviewed by a seismologist.

Magnitude 5.2
Date-Time

* Saturday, April 16, 2011 at 05:49:22 UTC
* Saturday, April 16, 2011 at 05:49:22 PM at epicenter

Location 43.626°S, 172.837°E
Depth 9.2 km (5.7 miles)
Region SOUTH ISLAND OF NEW ZEALAND

earthquake.usgs.gov...
Hope all is well your way. Ours was in the middle of nowhere much.

Originally posted by UtahRosebud
One in Australia...

This event has been reviewed by a seismologist.

Magnitude 5.2
Date-Time Saturday, April 16, 2011 at 05:31:19 UTC
Saturday, April 16, 2011 at 03:31:19 PM at epicenter

Location 20.034°S, 147.659°E
Depth 10 km (6.2 miles)
Region QUEENSLAND, AUSTRALIA
Distances 124 km (77 miles) SE (134°) from Townsville, Australia
400 km (248 miles) SSE (150°) from Cairns, Australia
1176 km (731 miles) S (178°) from PORT MORESBY, Papua New Guinea

Location Uncertainty horizontal +/- 17.4 km (10.8 miles); depth +/- 3.3 km (2.1 miles)
Parameters NST= 45, Nph= 49, Dmin=146.9 km, Rmss=0.92 sec, Gp= 76°,
M-type=body wave magnitude (Mb), Version=6
Source U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver

Event ID usc0002stu

USGS

Just came on to report this! QPS (Queensland Police Service) on their facebook feed said 'minor earthquake' I didn't think a 5.4 was minor for a place that rarely gets them. hmmm

I'll add that Geoscience Australia is calling it a 5.4, not a 5.2. GA Site here

Magnitude 5.2 Date-Time
* Saturday, April 16, 2011 at 05:49:22 UTC
* Saturday, April 16, 2011 at 05:49:22 PM at epicenter
Location 43.626°S, 172.837°E Depth 9.2 km (5.7 miles) Region

SOUTH ISLAND OF NEW ZEALAND

Distances * 16 km (10 miles) ESE (122°) from Christchurch, New Zealand
* 229 km (142 miles) SSE (155°) from Westport, New Zealand
* 306 km (190 miles) SSW (211°) from WELLINGTON, New Zealand

reply to post by zenius


If only it were a little lower! so bummed, I really want to feel one, damn you Brisbane! ;p. (I'll add that i'd like to feel a small one - so noone jump down my throat about how i'm doom-wishing!)

Also, do you guys think it could have something to do with the amount of ground saturation QLD has copped in the last 6 or so months? I hear up north is still getting hammered.

reply to post by bkaust


It's also saying 0 depth and info not finalised.
Sorry, I'd believe usgs over Geoscience. It's a typical Canberra based govt dept.

reply to post by bkaust


When I first went to Taipei in the U.S. Navy in 1970, we lived in the NCO guest house.

The 'houseboys' were our alarm clock.

They would knock on the door, and if necessary, come in and rouse one awake to avoid missing a watch/duty time.

I had a doubleback . . . 8 hours of sleep and going right back for another 8 hours at the Comm center.

A few hours into the 8 hours of sleep, i felt the bed shake and assumed in my groggy state it was the houseboy waking me up to go back to work. I said, OK, I heard him and I'd get up.

Shorly, the bed moved again--sliding back and forth several inches on the terrazzo floor.

I looked up this time and realized there was no houseboy and it was an earthquake.

I said, Welllll, Lord, I've GOT to have sleep--so if this is my time--please make it quick and take me to be with you. If not, help me sleep 'cause I sure need it for another 8 hours of work.

It got so over my 16+ years in Taipei, that quakes below 5.0 weren't even worth much comment. 5.0-5.5 or so were a little more interesting. 5.5 or so & above . . . one began checking for where one was in what type of building etc.

reply to post by zenius


hahaha yeah, your'e probably right there!

follow up to post by muzzy

Well I'll admit prediction isn't my main interest or forte anyway

You were right to see the tailing off of the aftershocks as being a bad sign MoorfNZ, its the only pattern that keeps showing up over and over here in NZ although the nation wide quakes were ticking along at a steady rate of 44,44,32 per day prior to today

Saying on the TV News there have been landslides and power out in some areas.
quite a strong trace from Rata Peaks www.iris.edu...

Apologies if this has been brought up when it was published. Having only recently been made aware of it, and not following this thread as closely as I do others, I ask you're indulgence if I may. If this has been discussed, please direct me properly and I will be much obliged.

The megaquake connection: Are huge earthquakes linked?

While demonstrating a domino effect is a challenge, Lay does have a geological mechanism that can link some large quakes that occur several months apart. He cites doublets - pairs of comparably large quakes that happen on the same or neighbouring faults within months of each other. In November 2006, an 8.3-magnitude quake shook the Kuril Islands north of Japan as the Pacific plate pushed beneath them. Two months later, in January 2007, the islands felt the force of a second large quake, this time an 8.1-magnitude event. When the Pacific plate lunged beneath the islands in the first of those quakes, it left the oceanic crust under tension. The January quake was the result of a new rupture that allowed the plate to stretch and thin to compensate (Nature, vol 451, p 561; and see diagram).

Source

There have been a few different threads around (this one, very stealthy but astute I believe and this one by TA to name a couple) discussing the possibility of other large quakes occurring in relation to the mega-thrust event of 03/11/11, it would seem as though there is some support for that idea in academia as well in these forums.

It would seem as though interesting times may be upon us.

Now Queensland has had an aftershock?

* This event has been reviewed by a seismologist.

Magnitude 4.7
Date-Time

* Saturday, April 16, 2011 at 07:06:54 UTC
* Saturday, April 16, 2011 at 05:06:54 PM at epicenter

Location 20.270°S, 147.632°E
Depth 16.2 km (10.1 miles)
Region QUEENSLAND, AUSTRALIA
Distances 142 km (88 miles) SE of Townsville, Queensland, Australia
143 km (88 miles) E of Charters Towers, Queensland, Australia
970 km (602 miles) NW of BRISBANE, Queensland, Australia

earthquake.usgs.gov...

The odd one here and there you hear about, but an aftershock as well....and it was only recently I joked with Westcoast about how silly it is for your regular insurance policy to cover earthquakes here in Queensland (but not floods mind you)

Another in NZ

Universal Time April 16 2011 at 8:40 NZ Standard Time
Saturday, April 16 2011 at 8:40 pm
Latitude, Longitude 43.59°S, 172.72°E
Focal Depth 9 km
Richter magnitude 4.1
Region Canterbury Location
* Within 5 km of Lyttelton
* Within 5 km of Diamond Harbour
* 10 km south-east of Christchurch

Originally posted by berkeleygal

Magnitude
5.8
Date-Time
Saturday, April 16, 2011 at 02:19:24 UTC
Saturday, April 16, 2011 at 11:19:24 AM at epicenter
Time of Earthquake in other Time Zones
Location
36.411°N, 139.649°E
Depth
20.1 km (12.5 miles)
Region
EASTERN HONSHU, JAPAN
Distances
26 km (16 miles) SW of Utsunomiya, Honshu, Japan
52 km (32 miles) E of Maebashi, Honshu, Japan
74 km (45 miles) W of Mito, Honshu, Japan
81 km (50 miles) N of TOKYO, Japan
Location Uncertainty
horizontal +/- 14.9 km (9.3 miles); depth +/- 5.7 km (3.5 miles)
Parameters
NST=493, Nph=498, Dmin=692.4 km, Rmss=0.67 sec, Gp= 29°,
M-type=regional moment magnitude (Mw), Version=B
Source
USGS NEIC (WDCS-D)
Event ID
usc0002srs

neic.usgs.gov...

I don´t like this one,seriously. Look where this one (Blue Dot North of Tokyo) is compared to the other bigger "Aftershocks"


Source - USGS





Here is one from April 12th



Source - USGS

Daily energy release graph for Tohoku (more graphs here)




The KMZ file available (see link) now only contains Mag 5+ as from yesterday as it was getting a bit cluttered on screen.

Edit for clarity: Apologies I should explain that this EXCLUDES the 09 Mar to 11 Mar period including the 9.0 otherwise the graph would be swamped and you would actually see nothing.

Just in case you are wondering, here it is!