Quake Watch 2011

Virginia is still shaking:

Magnitude
2.1
Date-Time
Tuesday, August 30, 2011 at 13:26:50 UTC
Tuesday, August 30, 2011 at 09:26:50 AM at epicenter
Location
37.920°N, 77.978°W
Depth
5.8 km (3.6 miles)
Region
VIRGINIA
Distances
11 km (7 miles) SSW (212°) from Mineral, VA
12 km (7 miles) S (170°) from Louisa, VA
25 km (15 miles) NE (41°) from Columbia, VA
31 km (19 miles) E (90°) from Lake Monticello, VA
62 km (39 miles) NW (313°) from Richmond, VA
139 km (86 miles) SW (218°) from Washington, DC
Location Uncertainty
horizontal +/- 0.7 km (0.4 miles); depth +/- 0.5 km (0.3 miles)
Parameters
NST= 11, Nph= 20, Dmin=2 km, Rmss=0.08 sec, Gp= 83°,
M-type=duration magnitude (Md), Version=A
Source
Southeast U.S. Seismic Network
Event ID
se083011a

Be Well.

Any idea what`s going on in Virginia?
www.iris.washington.edu...
I just checked the radar, and no storms.

reply to post by dragonlover12


Another small quake:

Tuesday August 30 2011, 13:26:50 UTC 41 minutes ago Virginia 2.1 5.8

reply to post by MamaJ


Hi,
No, all I am saying is that when the 9.0 hit Japan, all the seismo charts (including Yellowstone dun dun duuun!

) went into hyper drive. I am just saying how can a piddly 6. something, as we are becoming conditioned to larger eq's, have triggered this wobble?
Raibows
Jane

reply to post by summer5


Did you look at the webicorder?It looks really odd (at least to me)

I would understand if it was a big storm directly overhead, but what is this?

I appreciate your help, BTW

reply to post by dragonlover12


I looked at it, unfortunately, I am not the one to help read it? Hopefully one of the others will - it did like quite a bit going on for such a small shake.

reply to post by summer5


Thanks!
I have a friend that lives in Mineral, and since I moved to Arkansas from Virginia and still have family and friends there,I tend to worry.

reply to post by dragonlover12


I live in VA so I tend to be a bit focused on it since the big one here.

reply to post by dragonlover12

HT tremors?? perhaps bearth of an new volcano ?

reply to post by MamaJ


Sort of working backwards from angelchemuel.

Yes is the simple answer. All of those are cause by the one 6.8 - and note a 6.8 not a 6. Big difference (15.8 times stronger). It was also very deep.

@angelchemuel

Can't believe Bandan Sea quakes were big enough to set ALL of these off?

Basically any mag 6+ will show on virtually all the seismos on LISS. One reason is that nearly, no all, of these are LHZ channels so are long period instruments and pick up teleseisms - distant earthquakes. SHZ - short period instrument channels tend to be better at local quakes - hence many of the seismograms you will see - PNW, CERI, IsThisThingOn etc focus on short period channels.

In my signature go to the links and to learning and take a look at reading LISS if you have not already done so. (Decided to add the link for you)

You can rest assured that a 6.8 will ring all round the world without exception.

If you take a careful look at any of those LISS plots you can count the number of spikes in a ten minute period. On that one it is around 20 - I did not count it accurately. So this means that, as an example, station RSSD (Black Hills, South Dakota, USA ) actually moved up and down once every thirty seconds (just a little bit) as the wave passed through. Yes, the ground did move all round the world, but so slowly that no one will have noticed at great distances.

To understand that a little better read this article on the 1999 AUG17, Turkey Earthquake - 7.8



ETA: Look at this post in the Yellowstone thread. It may have gone round twice. I am not 100% sure about that but it looks like it.

reply to post by dragonlover12


Ha Ha, I saw that earlier and just knew someone would pick upon it.

Don't know about storms, unless it got some water in it, but basically that puppy is off line with a headache.

ETA: See it in plot view


You can see the transmission break.

By the way if you got that from my signature you will note that that plot is for yesterday.

Here is today's direct from BUD explorer



Looks as if there is a software glitch and it is returning the wrong day.

NOTE: I have changed the source of the webicorder in my signature to bypass the normal one and go direct to BUD. It works correctly now. (There are about three different sources for these things)

reply to post by PuterMan


Thank you PuterMan. I have been called to my mother's care home, she is not well, so I shall read it as a 'distraction' when I get back.
Now no major events while I am away guys!
Rainbows
Jane

reply to post by PuterMan


Thank you.

I saw it go "psyco" yesterday, but seemed to be corrected enough to pick up the "normal" quake earlier.

Thank you for all the links and help!

Originally posted by PuterMan
reply to post by muzzy

 

MAG ~ TNT TONS ~TNT KILOTONS

And the calculation is? (Being lazy I have it somewhere but others might like to know)

I dunno how to use logarithimythingys , I just used the calculator and divide the tons by 1000 to get Kilotons

The Richter scale is defined using the logarithm base 10 as:

R = 2 over 3 log E over Eo
( * couldn't type fractions on here)

Where, Eo = 104.8 Joules is the energy released by a small reference earthquake. The energy, E can be obtained directly from the Gutenberg-Richter magnitude-energy relation, here expressed in units of Joules:

log E = 1.5×R + 4.8 or equivalently:

E = 101.5×R + 4.8

Since detonation of 1 ton of TNT releases 4.184×109 Joules; we can convert these units to equivalent tons of TNT.

Copyright © 2004, Stephen R. Schmitt

And heres another page which covers the same thing, but also has = Hiroshima Nuclear Explosion
www.jclahr.com...
ie a Mag 5 is equal to 2.12 Hiroshima bombs ( * so to those that poopoo Mag 5's, show some respect plz, how would you like 2.12 Hiroshima bombs going off 3km from your house and 10 - 30km down?)

and for those that didn't know (like me) TNT stands for Trinitrotoluene

El hierro earthquake count exceeds 4200

"The number of daily earthquakes recorded on the smallest of the Canary Islands (Spain), El Hierro, has increased considerably in recent days. The Instituto Volcanologico de Canarias has also reported a 1cm inflation over part of the island’s volcano following on from GPS analysis.

The total number of tremors recorded during the past five weeks has now exceeded 4200, according to the Instituto Geografico Nacional (IGN).

I don't have to tell you what will happen if a big one hits the Canary Islands... especially if the big volcano goes off and half the island falls into the ocean... the earthquakes are happening on El Hierro... but it is probably affecting La Palma...

Probably the whole east coast of the Americas is screwed. Brazil, Mexico, Cuba, US, Canada... etc... all screwed.

From Wiki :

"Computer modelling indicates that the resulting initial wave may attain a local amplitude (height) in excess of 600 metres (1,969 ft) and an initial peak to peak height that approximates to 2 kilometres (1 mi), and travel at about 1,000 kilometres per hour (621 mph) (approximately the speed of a jet aircraft), inundating the African coast in about 1 hour, the southern coast of England in about 3.5 hours, and the eastern seaboard of North America in about 6 hours, by which time the initial wave would have subsided into a succession of smaller ones each about 30 metres (98 ft) to 60 metres (197 ft) high. These may surge to several hundred metres in height and be several kilometres apart but retaining their original speed."

Yeah... ``smaller waves`` of 100 ft minimum going at 620 mph... no big deal right?

Hell if that ever happens, the whole world is screwed... you think the nuclear power plants on the coast will be shut down in time? You think that even if they are shutdown in time, they won't be destroyed sending thousands of tons of radioactive debris all over?

You think ONE fukushima is bad? What about 20? What about 30+ million corpses floating around the east coast? Hundreds of cities wiped out? Millions of cars floating around? How much time do you think it will take to clean this whole mess? Decades? You bet.

This was from ealier in June...


The report on the cumbra vieja :

reply to post by Vitchilo

Way to go Vitch, that is a serious amount of fearmongering!!

Somewhere back several pages I gave the link that debunks that theory. I will go and find it.

Here it is

Do have a read because the data was flawed, but then why wouldn't it be - they were scientists!

Originally posted by PuterMan
reply to post by Vitchilo

 

Way to go Vitch, that is a serious amount of fearmongering!!

You think so too uh?

I love doom, sorry.

And yeah, looking at the Alaska tsunami event, we can see that big tsunami lose a LOT (aka most) of their strength real fast... so they certainly cannot travel 2000 km and be as strong.

Even the Japanese earthquake was very very very powerful (probably way more than anything the cumbre viaje blowing up would equal to) and that created a tsunami of ``only`` a maximum of 35 ft or so... and the earthquake was about 250 km from the shore... the tsunami hitting Hawaii or California/BC was a joke... so it would probably be the same with Cumbre Viaje.

reply to post by Vitchilo


Well "Lord Vitch of Doom", yes we all like some doom from time to time.

That last video. Did you hear that scientist claim they had successfully predicted 95% of all major earthquakes in the past three years.

What an out an out liar!

@muzzy: what I came on to say before I got sidetracked by Lord Vitch was divide the joules or megaghouls or whatevajoules by 4184 to get the TNT since 1 gram of TNT is 4184 Joules.

Oh and by the way trinitrotoluene is made from toluene and nitric acid. We used to make it in the Chemistry labs at school!! We had a really cool pyromaniac chemistry teacher.

Originally posted by PuterMan
reply to post by Vitchilo

 

That last video. Did you hear that scientist claim they had successfully predicted 95% of all major earthquakes in the past three years.

What an out an out liar!

Yep!

Originally posted by PuterManOh and by the way trinitrotoluene is made from toluene and nitric acid. We used to make it in the Chemistry labs at school!! We had a really cool pyromaniac chemistry teacher.

Lucky you!

Puterman....what do you make of this?????

Top three are Long Vallery Caldera at Mammoth Springs, bottom one is west of it on the San Andreas: