What's Going On At Long Valley SuperVolcano?

I mean really. I just picked up what appears to be some kind of long period event about 30 to 45 km east of Mono Lake. So then I went and pulled back data for the last days, and I am having a hard time digesting what I am seeing. Because it don't look good.

Since deciphering these things really does take a rocket scientist, I have written to my sources asking for opinions. Since those can take a while, in the meantime have a look for yourselves.

Stations of concern are NN.HCK, NN.LHV, and NN.BON

Take a look at this trace at HCK:
www.iris.edu...

WHAT is that long period event? I sure hope it is not some kind of tremor. Let's hope it was just them adjusting the sensitivity of the webi interface. But I'd be lying if I told you I really thought that. The frequency content under spectro shows that to be rather nasty, imo, and appears seismic to me. But it is not my opinion that matters. Let's wait and see what the experts say. There are also a lot of questionable signatures on those stations last two days, and I haven't even looked at before then, so I don't know yet. Perhaps will pull more data soon.

The LV caldera is another "big elephant in the room." And it is precisely this kind of signature that can raise some eyebrows. Until I hear back I am reserving real comment, but so far I have given you everything I've got on this.

reply to post by TrueAmerican


I always worry when you make threads like this. Theres only a few of you on this site worth taking seriously. s+f TA.

reply to post by thedoctorswife


Thanks, and yeah, don't mean to worry, but damn....that signature DOES really concern me.

Nobody freak though until the experts freak. And they won't freak no matter what, so... But I am on it. Not long after that signature occurred, there was another small microquake that happened, but curiously, that registered on all the other seismos at LV, not on these. These stations are to the east and slightly north of Mono Lake. It is possible, with all the telemetry error going around, that this could be error. But it sure doesn't look like it to me. That content shows seismic, if I've ever seen it.

Could it be magma on the move?

I have seen that signature somewhere,maybe from the Canary Islands?

reply to post by TrueAmerican


When can we expect to hear back from the experts?

reply to post by TrueAmerican


Your threads are always worth reading and thank you for being sharp enough to spot this. Although I live in one of the most seismically inert contries in the world, I watch the volcanoes regularly, as a big event would affect us all. Let's all hope it's just a hiccup. Not liking what I read about it's history though.

Long Valley Caldera

A couple of graphs showing earthquake swarms at the area


volcanoes.usgs.gov...

I cant put images up but if someone could it may interest op and others.

Amending this to ask that what constitutes a swarm, i.e. numbers versus time period and in what area.

Mag Date/Time (UTC) Depth (km)
1.07 06/25/2012 18:39:18 7.97
0.5 06/24/2012 13:34:07 10.16
0 06/24/2012 13:02:18 0.03
1.68 06/24/2012 05:26:43 7.12
0.53 06/24/2012 00:32:19 1.43
0.51 06/23/2012 07:56:55 3.13
0.18 06/23/2012 07:55:32 4.85
0.06 06/23/2012 05:26:20 3.53
0.41 06/23/2012 03:28:36 5.84
0.28 06/22/2012 16:44:36 6.18
1.02 06/22/2012 01:05:34 5.11
1.16 06/21/2012 14:44:11 2.73
0.62 06/21/2012 13:28:06 5.99
0.43 06/21/2012 03:43:29 4.78
0.24 06/21/2012 00:58:13 2.55
0.7 06/21/2012 00:17:49 2.76
0.13 06/20/2012 20:52:44 7.74
0 06/20/2012 20:52:15 7.15
2.59 06/20/2012 20:10:25 12.13
0.23 06/20/2012 19:35:00 6.34
0 06/20/2012 19:15:39 9.8
0.03 06/20/2012 18:17:58 8.41
0.63 06/20/2012 17:13:23 4.87
1.83 06/20/2012 16:11:58 17.5
0.64 06/20/2012 13:47:03 6.31
0.25 06/20/2012 11:22:03 3.08
0.34 06/20/2012 11:19:29 6.91
0.2 06/20/2012 11:19:03 3.63
1.16 06/20/2012 06:02:08 10.42
0 06/19/2012 17:38:59 7.14
0.69 06/19/2012 07:26:29 8.67
0.27 06/19/2012 07:26:06 8.5
1.13 06/19/2012 06:59:47 7.49
0.25 06/19/2012 05:30:29 7.7
1.61 06/19/2012 02:09:43 17.8
0.65 06/19/2012 01:22:28 7.55
0.64 06/19/2012 00:47:30 8.01

37 in 6 days. All over the place depth area etc. Ahh more research. Thanks for letting me know about this op.

Well the very first thing I am sure they will look for is to see if this signature is a teleseism. In other words, just the registering of a distant quake. Problem is, I have done this to a degree, and I don't see it matching up to any other quake. I don't do this to the degree they do however, and I will be very curious as to what "teleseism" they point to as the cause for this one.

Usually, my contact would respond to a request like this rather pronto, within an hour or so. So far they haven't, and I imagine they have already assessed that it is not likely a "tele". But they are also very busy at the moment, and out of the office a lot. So I will not make any presumptions. All I can do is wait.

a lot of what you said sounds like a foreign language to me but i'm definitely interested!

we're waiting for your contact to give you the scoop? i hope you get more info SOON

Ok so checking around more on this on my own (still no response yet), I pulled up a nearby station, MLN on the NN network, and I have found something even worse. Frequency content of this is worrying to say the least.

www.iris.edu...

That station is about 40 km south of station BON.

That is a long period event from hell.

Ok, I am worried. I really really need to hear from my source on this. Waiting, tapping foot.

Take a look at this trace at HCK:

The trace at the bottom looks like a fuse timed underground mine blasting sequence.
16 holes in a tunnel face would give you something that looked like that but they would be small unless they were very close to the instrument (

Originally posted by ANNED

Take a look at this trace at HCK:

The trace at the bottom looks like a fuse timed underground mine blasting sequence.
16 holes in a tunnel face would give you something that looked like that but they would be small unless they were very close to the instrument (

Also, there is a bit more on this: This event in question in the op did not happen in the LV caldera itself, but some 40 to 50 km northeast of there. Still trying to see if I can find more stations...like on the PB network, perhaps...

EDIT: nope, PB network doesn't have any stations near where this event occurred, from what I am showing. If anyone believes otherwise, please post. But there might be a couple of other networks I can check. I'd really like better verification of that signature- more than just one network, even though we do have three stations on that one network showing the event.

Thanks for bringing this to our attention. I read
your posts on the Quake thread and if you are
concerned so am I. Let us know when you hear
from the experts, I will be checking back.

Do you happen to have a map of the area
that you favor?

reply to post by crazydaisy


Well here's one map, so people can get an idea:
LINK

Think 40 to 50 km or so northeast of the LV caldera itself shown in the pic.

Still getting strange signals at MLN. But that's 40 km south of the event in op, and about 45 km or so east of the caldera... hmm... dunno folks, bear with me as more info is hopefully forthcoming.

A Star, Flag, and subscription from me. Just tell us when to duck and cover, until then I'll be drinking a beer and watching it rain.

reply to post by getreadyalready


Well perhaps it is safer to reside in the broader perspective of the situation:

The caldera itself seems to be quiet, more or less. It's not like we have massive tremors anywhere or big quakes, or swarms even. That is NOT happening, just to be clear. And at this point I am live monitoring many of the stations.

Looking at seismos in the area is a maze of telemetry error, man made events, older analog instruments mixed with new, and thus high noise on many, and the occasional seismic event. In other words, the usual. I am not totally writing off the possibility of mine blast. Just leaning in the no direction from what I know. . Perhaps John Vidale or Puterman could weigh in on this, and we can be done with it.

Something weird is sure going on with Volcanoes -




Strange skies all around the world too - odd and unusual cloud formations like prior to quakes but different if you know what I mean???? Just darn weird!!!

S&F I'm so glad somebody is keeping their eagle eye on these things.

reply to post by TrueAmerican

Any chance that you will post the excel? I would love to dive into this, figuratively speaking.

Cheers!

It appears that many volcano's that have salt fields are acting up of late. Interesting. Is it connected to the Yellowstone caldera system? Anyone know? I'm a newb with regard to this stuff. But it is VERY interesting!