Quake Watch 2013

does anyone have a link or "gee" station that is closest to the cascadia subduction zone???

reply to post by PuterMan


Those long waves, the ones that don't cause vibration of the surface, what happens to the energy. Does it just move and get absorbed by the land or ocean? Do these cause swells to form on the ocean?

I've seen what a backhoe digging next to the lake does to a calm lake, it causes ripples way out. Trains running far from the water can cause tiny waves to appear on a lake. Maybe even a farmer plowing his fields causes waves.

Thanks for the info and links, I should check on this, I think there is an old seismograph in the garage up north yet, hopefully nobody threw it away. It would be fun to play with it. I think my stepfather got it for near nothing at an auction .

Originally posted by PuterMan
reply to post by rickymouse

 

Just to add, when you see a seismogram in America registering an event it is indeed a fact that the ground has moved. Amongst those links on that page you will find Oklahoma Geological Survey Seismogram, Spectrogram, and Magnetogram Index

interesting web site I haven't seen before.
I found this page there annual maps 1977 -2003 and the okecatalog here

It would take a bit of time, to "muzzify" the data in there (convert to interactive coloured icon maps muzzy style) , but it might be worth the effort, it kind of looks to me that "fracking" has been getting the blame for a lot of earthquakes lately, without any proper investigation as to the seismic history of the area. Or did I miss the memo?.
Next rainy day I'll run that stuff through and see what we get.

www.ldeo.columbia.edu/~ekstrom/Research/SWD/current/RADB_SWD_grd.html

2013 7 1 23 35 20.0 -35.25 53.75 33.0 4.9 SOUTHWEST INDIAN RIDGE
2013 7 1 12 32 48.0 -29.75 75.75 33.0 4.9 MID-INDIAN RIDGE
2013 7 1 10 13 44.0 -29.75 75.25 33.0 4.9 MID-INDIAN RIDGE

Magnitude Mw 6.1
Region NORTHERN SUMATRA, INDONESIA
Date time 2013-07-02 07:37:03.0 UTC
Location 4.72 N ; 96.57 E
Depth 10 km
Distances 594 km W of Kuala Lumpur, Malaysia / pop: 1,453,975 / local time: 15:37:03.0 2013-07-02
166 km SE of Banda Aceh, Indonesia / pop: 250,757 / local time: 14:37:03.0 2013-07-02
55 km S of Bireun, Indonesia / pop: 25,793 / local time: 14:37:03.0 2013-07-02

www.emsc-csem.org...

I was away and missed this one on July 1st:

M3.2 - 6km NW of Fairport Harbor, Ohio
2013-07-01 07:48:45 UTC

This may not seem like anything to some but Ohio doesn't have many quakes and this is off shore. Historical says the largest here is 5.4 back in 1937

The strongest tremor of this series occurred at 11:45 p.m., March 8, 1937. At Anna, chimneys repaired after the March 2 earthquake were again thrown down, with scarcely a chimney undamaged (intensity VII to VIII). Organ pipes were twisted in one church and other church and school buildings were badly cracked. A few chimneys also fell at Sidney and there was damage to plaster. The affected area was much larger than that of the previous earthquake. The 388,000 square kilometer area covered all of Ohio and Indiana, parts of Illinois, Kentucky, Michigan, and a few places in Missouri, Pennsylvania, West Virginia, Wisconsin, and Ontario, Canada. Outstanding phenomena common to both the March 2 and March 8 earthquakes were the rotation of tombstones and subsurface changes revealed by the activities of wells. Marked changes in the behavior of wells were reported from Botkins, Huntsville, and New Knoxville.

M5.2 - 48km W of Kigorobya, Uganda 2013-07-02 13:33:18 UTC

Event Time
2013-07-02 13:33:18 UTC
2013-07-02 16:33:18 UTC+03:00 at epicenter
2013-07-02 08:33:18 UTC-05:00 system time

Location
1.583°N 30.877°E depth=20.5km (12.7mi)

Nearby Cities
48km (30mi) W of Kigorobya, Uganda
54km (34mi) WNW of Hoima, Uganda
69km (43mi) E of Bunia, Democratic Republic of the Congo
92km (57mi) S of Paidha, Uganda
235km (146mi) NW of Kampala, Uganda

USGS

reply to post by piequal3because14

Earthquake in Bener Meriah, Sumatra, Indonesia – 5 fatalities, dozens of people injured due to collapsed buildings and landslides.

Due to the fatalities, the status of this earthquake has increased to CATDAT Red.

Source

5.0 74km ESE of Lar, Iran 2013-07-02 06:18:32 UTC-05:0010.0 km
5.6 17km NNW of Hihifo, Tonga 2013-07-02 04:38:41 UTC-05:0042.8 km

USGS

hmm I have some friends in Indonesia, but not in this region

reply to post by steve95988

Well, the subduction zone is close to 800 km long, so there are many stations that cover it.

This page from PNSN shows all of the seismometers in their coverage area. (on the right of the screen, "uncheck" the 'display clusters' box to see the individual stations)

I like to use the PBO network stations, because they are down boreholes, so they have less cultural noise to sift through. From this network, B046 is near Ferndale, CA, B026 is along the north-central Oregon coast, and B926, B927, & B928 are under Vancouver Island, BC.

That will give you basic coverage. Until a new version of GEE is released, many of the stations will not load because of a software change.

....................................

Speaking of the CSZ , I think a quake happened off the coast of Coos Bay, OR or maybe a bit farther north, at 01:16:40 "ish" UTC today.
I'm hoping it gets listed soon, because I'm puzzled by the different arrival times and waveforms.
This is what it looks like closer to the coast; from north to south:
source(south of Tillamook, OR)

source(Reedsport, OR)

Now look at a few inland stations; the first is a UO.DBO.BHZ spectrogram, the second is UO.IRO.EHZ .
The 1st waves on the inland stations show up about 12 seconds later than the ones closest to the coast, but they look much stronger.
source(south of Roseburg, OR)
more spectros from CSZ


source(in-between Eugene & Bend, OR)

reply to post by lurksoften
So sorry to hear that,I hope the damage and casualties will not increase and no other earthquake of that magnitude or higher will take place in that area.

47min ago

2013-07-02 18:39:43.3 35.62 S 103.23 W 10 5.9 SOUTHEAST OF EASTER ISLAND

www.emsc-csem.org...

will probably go down
2013-07-02 18:39:45 5.6 35.88°S 102.80°W 10 A Southeast of Easter Island
geofon.gfz-potsdam.de...

at this time Useless are still in the dark

Originally posted by aLLeKs
hmm I have some friends in Indonesia, but not in this region

same here....i have a friend on langkawi island malaysia. it faces indonesia and also the open ocean with a fault line running right past it. i have contacted him and told him to be alert. told him if you see the locals running...FOLLOW.

reply to post by bellagirl


Sorry to say that it is worse than is being reported thus far...

Earthquake in Bener Meriah, Sumatra, Indonesia – at least 25 people killed, +100 people injured due to collapsed buildings and landslides

Link

From the site

We are truly IRRITATED that the world press seems to focus only on wars and hardly reports about the misery of this earthquake. Roads are blocked, people are still under the rubble, etc. This is an important human tragedy and the only thing the world is doing is looking the other side !

Hope your loved one is safe.

why should world press care? it has no relation to the USA... just saying. (not my opinion)

Saddly this is often the reason to report. For example the big 8.0 ones we had earlier this year at Santa Cruz havent been reported at all, at least not in Germany.

Indonesia is not an "important" country in the eyes of the world press. 25 deaths are not enough to justify any reports... but if 1 European or American dies it will be reported... this is the sad truth about hour media :/

Anniversary in 1 1/4 hrs

40.023° S 173.756° E 2012-07-03 10:36:15 UTC 229.8 km 7.1ML (MW6.3) Cook Strait, New Zealand

thats that one that shook us here to the point we nearly got out of bed and took cover but it stopped before we did.

I was just looking at Wilber3 (which has some amazing data buried inside it) and found this graph which shows the global seismo traces based on distance.

[color=8BB381](click image for larger version, opens in new tab/window)
www.iris.edu...

This was the last big quake here, been a while !

This one had my heart pump a bit harder and faster, felt some adrenaline push in my head.

03.07.2013 09:05:56 65.062 -16.560 2.6 km 6.6 75.95 3.4 km NE of Dreki


But let's wait for the correction by an Icelandic Geologist at Icelandic Met Office


edit 1
Corrected it seems, removed actually.

M5.7 - 51km W of Kigorobya, Uganda 2013-07-03 19:21:46 UTC

Event Time
2013-07-03 19:21:46 UTC
2013-07-03 22:21:46 UTC+03:00 at epicenter
2013-07-03 14:21:46 UTC-05:00 system time

Location
1.563°N 30.850°E depth=9.8km (6.1mi)

USGS

5.3 70km N of Bristol Island, South Sandwich Islands 2013-07-03 15:16:39 UTC-05:00140.7 km
5.3 116km NE of L'Esperance Rock, New Zealand 2013-07-03 10:09:03 UTC-05:0071.7 km
5.0 41km ESE of Namie, Japan 2013-07-03 10:06:11 UTC-05:0016.2 km
5.2 6km SSE of Aiani, Greece 2013-07-03 08:28:23 UTC-05:003.7 km
5.2 52km E of Farkhar, Afghanistan 2013-07-03 02:04:17 UTC-05:00203.8 km

Uganda is a strange one 5.2 June 2nd then 5.7 June 3rd when they are lucky to get one 5 or above per year. I looked up the region and found this

Heritage Oil (LSE: HOIL, TSX: HOC) is an independent Jersey-based oil and gas exploration and production company. Its activities are focused on Africa, the Middle East and Russia. It is listed on the London Stock Exchange and has a secondary listing on the Toronto Stock Exchange.

Wiki

The company is the operator and holds 50% interests in two licences in the Albert Basin of the Western Rift Valley of Uganda. Recent exploration activity has focused on the eastern shores of Lake Albert, which straddles the border of Uganda and the Democratic Republic of Congo, and Kurdistan. The company is also active in Russia, Malta, Mali and Tanzania.

Oh, here is another...so now that is 3 in two days over 5

M5.4 - 57km W of Kigorobya, Uganda 2013-07-03 22:22:18 UTC

reply to post by rickymouse

Those long waves, the ones that don't cause vibration of the surface, what happens to the energy. Does it just move and get absorbed by the land or ocean? Do these cause swells to form on the ocean?

They do move the surface but over such a long 'period' that we would not really call it a vibration, but it is still expending it's energy (called attenuation as it reduces the signal) and eventually will fizzle out, so yes it gets absorbed by whatever it passes by.

Someone please correct me if I am wrong but ocean swell is caused by the wind just as the smaller waves are. The only swell caused by an earthquake is a tsunami. I don't believe that the seismic waves can cause a swell - even the surface seismic waves.

reply to post by PuterMan


A train running over a track does make little waves in a perfectly calm lake, they start a while before the train even gets there. It takes about five minutes after the train goes by for the ripples to subside. I fished a lot by the traintracks when I was young. The train usually came by once a day that I knew of, usually hauling coal.

I can't imagine that earthquakes would not make waves, it would be hard to distinguish though. There are quakes and volcanic activity constantly going on around the world. When the ice cracks off a glacier, you can feel the snap through the ground, I experienced that in Alaska. I think all these events cause waves or possibly swells to form but they are just so common that noone thinks of it.