Quake Watch 2011

reply to post by Lil Drummerboy


The last 4 hours - nothing above a 5...

2011-03-20 21:01:12.935min ago 36.76 N 21.45 E 10 ML 2.7 SOUTHERN GREECE 2011-03-20 21:05
2011-03-20 20:56:00.540min ago 40.47 N 29.12 E 5 ML 2.8 WESTERN TURKEY 2011-03-20 21:35
2011-03-20 20:47:34.049min ago 36.92 N 141.87 E 60 mb 4.8 NEAR EAST COAST OF HONSHU, JAPAN 2011-03-20 21:24
2011-03-20 20:17:57.01hr 18min ago 37.16 N 141.84 E 30 mb 5.0 NEAR EAST COAST OF HONSHU, JAPAN 2011-03-20 21:18
2011-03-20 20:05:28.01hr 31min ago 37.13 N 141.29 E 60 mb 4.5 NEAR EAST COAST OF HONSHU, JAPAN 2011-03-20 21:36
2011-03-20 20:05:08.71hr 31min ago 48.04 N 25.54 E 10 ML 2.4 UKRAINE 2011-03-20 21:35
2011-03-20 19:54:19.01hr 42min ago 37.44 N 140.99 E 15 mb 4.8 EASTERN HONSHU, JAPAN 2011-03-20 21:12
2011-03-20 19:47:54.01hr 48min ago 37.97 N 14.49 E 3 ML 2.1 SICILY, ITALY 2011-03-20 19:59
2011-03-20 19:46:55.01hr 49min ago 25.09 S 179.66 E 500 mb 4.9 SOUTH OF FIJI ISLANDS 2011-03-20 20:36
2011-03-20 19:04:27.72hr 32min ago 3.35 S 99.78 E 10 M 4.5 SOUTHWEST OF SUMATRA, INDONESIA 2011-03-20 19:35
2011-03-20 18:43:48.02hr 52min ago 38.44 N 141.78 E 60 mb 4.7 NEAR EAST COAST OF HONSHU, JAPAN 2011-03-20 19:21
2011-03-20 18:35:39.63hr 01min ago 30.65 N 137.84 E 502 mb 4.2 IZU ISLANDS, JAPAN REGION 2011-03-20 19:42
2011-03-20 17:33:56.04hr 02min ago 39.18 N 22.49 E 10 ML 3.0 GREECE

reply to post by Lil Drummerboy


If my calculations are correct, 188 days before the Chile quake would have been August 19 2009, which there were no major quakes. The only thing I could find on that day was an odd tornado event in Minnesota..

climate.umn.edu...

And Hurricane Bill..
www.fema.gov...

This FEMA link says that there were no earthquakes, so I guess the 188 day loop started with the Chile earthquake. Its probably coincidence, although a strange one..

ETA: August 24, 2009 is the correct date being 188 days before the Chile quake. Sorry.

reply to post by kennylee


My searching on EMSC between the 18th & 24 August 2009 found only a 6.2 south of Fiji on the 18th and a 6.0 in the Norwegian Sea on the 20th. Nothing bigger than those.

reply to post by zenius


Thanks for that info. I went back and counted the days on the calendar and found that I was off on the Aug 19 date. It was the 24th, so it was good that you checked that date.

Now my last thread about the 19th was useless.

Unless someone can figure out a correlation with the 188 days from the Chile quake, then Id mark it up to coincidence. Isn't that comet supposed to be here sometime in Sept?

reply to post by Lil Drummerboy


24th August 2009. Nothing spectacular unfortunately. 5.4 is the biggest

Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
2009-08-24T22:04:28.000Z,-37.52850,-179.25020,4.4000,33.0000,east of the North Island of New Zealand
2009-08-24T15:20:02.000Z,-6.93530,129.44180,4.6000,179.4000,Banda Sea
2009-08-24T11:36:00.000Z,-22.52120,-65.88770,4.8000,224.5000,Jujuy. Argentina
2009-08-24T05:53:39.000Z,24.73190,127.53550,4.9000,35.0000,southeast of the Ryukyu Islands. Japan
2009-08-24T05:26:16.000Z,40.99000,140.09690,5.4000,163.5000,eastern Honshu. Japan
2009-08-24T02:13:54.000Z,9.44700,123.05500,4.6000,167.6000,Negros - Cebu region. Philippines
2009-08-24T02:10:38.000Z,33.20500,138.26220,4.3000,276.5000,Izu Islands. Japan region

Source: My Database based on USGS/EMSC et al

Little List of dates descending each 188 days apart. Unfortunately the Feb date is the 28th not the 27th.

11/03/2011
04/09/2010
28/02/2010
24/08/2009
17/02/2009
13/08/2008
07/02/2008
03/08/2007
27/01/2007
23/07/2006
16/01/2006
12/07/2005
05/01/2005
01/07/2004
26/12/2003
21/06/2003
15/12/2002
10/06/2002
04/12/2001
30/05/2001

28th Aug 2009
Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
2009-08-28T01:51:20.000Z,-7.12650,123.43000,6.8000,642.4000,Banda Sea

That is about the closest of any size.

reply to post by kennylee

Actually the Christchurch Sept quake was 7.1 and it was on the 3rd UTC (4th NZST)
geonet.org.nz...

This may throw your numbers out

What a day the 20th UTC was in NZ in the end

as well as the 3 x Mag 4 quakes in Otago and the 5.1 at Bromley, Christchurch that Zenius posted earlier in the day and an additional later deep 4.5 n Otago, there was these other 2 high Mag 4's just before the 5.1

MAG, REF, LAT, LONG, UTC DATE/TIME, DEPTH, LOCATION, FELT
4.913, 3481459, -37.96351, 176.24467, 2011/3/20 7:30:13, 250, N of Lake Rotorua, Bay of Plenty, No
4.958, 3481458, -37.51817, 176.58391, 2011/3/20 7:30:13, 190, o/ds NE of Motoiti Island, Bay of Plenty, Yes


March NZ Timeline Graph

Of the 34 quakes found on the 20th, 16 on the Australian Plate and 18 on the Pacific Plate, pretty even numbers wise, I wonder how the balance was energy wise in the battle for supremacy?, do 2 x 4.9's beat a 5.1 and 4 x low 4's

@ Muzzy, yesterday was the first time I watched Geonet all day and after seeing how active it has been I think I'll be watching it more often.


* This event has been reviewed by a seismologist.

Magnitude 5.6
Date-Time

* Monday, March 21, 2011 at 09:49:01 UTC
* Monday, March 21, 2011 at 02:19:01 PM at epicenter
* Time of Earthquake in other Time Zones

Location 36.563°N, 70.944°E
Depth 184.6 km (114.7 miles)
Region HINDU KUSH REGION, AFGHANISTAN

usgs

What is the meaning of the depth in quakes?

This one was almost 200km deep?

Magnitude 5.4
Date-Time

* Monday, March 21, 2011 at 10:36:49 UTC
* Monday, March 21, 2011 at 06:36:49 PM at epicenter

Location 13.932°N, 120.560°E
Depth 92 km (57.2 miles) set by location program
Region MINDORO, PHILIPPINES

USGS

reply to post by borutp


Generally the deeper it is the less chance of it being felt or causing damage at the surface.
2nd

MAG 5.8 HINDU KUSH REGION, AFGHANISTAN

Monday, March 21, 2011 at 09:49:02 UTC

USGS

Originally posted by borutp
What is the meaning of the depth in quakes?

This one was almost 200km deep?

Here's some information for you from the USGS.

Q: What is the significance of the depth of an earthquake?

A: Earthquakes occur at depths from near the Earth's surface to about 700 km deep. (See Determining the Depth of an Earthquake.) Below that depth, rocks are too hot and ductile, so they tend to bend and flow rather than break in a brittle manner. The strength of shaking from an earthquake diminishes with increasing distance from the earthquake's source, so the strength of shaking at the surface from an earthquake that occurs at 500km deep is considerably less than if the same earthquake had occurred at 20 km depth.

Also, the depths of earthquakes gives us important information about the Earth's structure and the tectonic setting where the earthquakes are occurring. The most prominent example of this in in subduction zones, where plates are colliding and one plate is being subducted beneath another. By carefully plotting the location and depth of earthquakes associated with a subduction zone, we can see details of the zone's structure, such as how steeply it is dipping, and if the down-going plate is planar or is bending. These details are important because they give us insight into the mechanics and characteristics of the deformation in the subduction zone.

Accurately determining the depth of an earthquake is typically more challenging than determining its location, unless there happens to be a seismic station close and above the epicenter. So generally, errors on depth determinations are somewhat greater than on location determinations.

USGS FAQ

USGS - Determining The Depth Of An Earthquake

So if an earthquake registers 5.0 but it is 500 miles below the surface, it wont be felt nearly as much as one that was only 5 miles beneath the surface?

From where do they take the measurements that determine the Richter reading?

Originally posted by Taupin Desciple
So if an earthquake registers 5.0 but it is 500 miles below the surface, it wont be felt nearly as much as one that was only 5 miles beneath the surface?

From where do they take the measurements that determine the Richter reading?

Correct.

Read the FAQ links in my post above yours. You will find answers to your questions.

It would seem like things overall have calmed down. Japan is still moving, and there's the usual assortment of quakes in the Pacific. There's only been one above 5.5M. And that's in Asia at 5.8M.

I'm wondering if the Indian Plate is showing signs of stress. Afghanistan and Iran would be areas to watch. If the Indian Plate decides to move, it will be a large event. I'd put a long-shot bet on the Himalayas jumped up a foot or two.

This event has been reviewed by a seismologist.

Magnitude
2.9
Date-Time
Monday, March 21, 2011 at 22:02:01 UTC
Monday, March 21, 2011 at 06:02:01 PM at epicenter
Location
34.886°N, 79.970°W
Depth
5 km (3.1 miles) set by location program
Region
SOUTH CAROLINA
Distances
4 km (2 miles) NE (47°) from Morven, NC
8 km (5 miles) N (4°) from McFarlan, NC
9 km (6 miles) S (171°) from Lilesville, NC
54 km (34 miles) ESE (102°) from Monroe, NC
86 km (53 miles) ESE (114°) from Charlotte, NC
426 km (265 miles) ENE (72°) from Atlanta, GA
Location Uncertainty
horizontal +/- 8.6 km (5.3 miles); depth fixed by location program
Parameters
NST= 8, Nph= 15, Dmin=133.6 km, Rmss=1.21 sec, Gp=104°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source
U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver
Event ID
usc00028gt

this just popped up - not an area I see mentioned much in quake circles..



Magnitude 2.9 SOUTH CAROLINA

(beaten by berkleygal!!)

reply to post by berkeleygal


Drats it missed the Ex by 100 miles -

Long Weekend and so glad to be back home (laptop died while away - go figure) - the supermoon here on the East Coast was SUPER (for the first hours after rising)!! Glad I didn't miss out on anything big while away. The window is until the 26th if I not mistaken. I have this god aweful headache now for 3 days (unfortunatly not cocktail induced). Hoping it is just a weather thing and not the earthquake one. -

Originally posted by MoorfNZ
this just popped up - not an area I see mentioned much in quake circles..



Magnitude 2.9 SOUTH CAROLINA

(beaten by berkleygal!!)

edit on 21-3-2011 by MoorfNZ because: (no reason given)

A clue may be found in the map of the quake. If you look on google maps, just north of the quake there is a giant tailings reservoir. There's mining in the area.