Just had an earthquake in California – 56 earthquakes (so far) in cluster near Mt. Lassen Volcanic National park

Felt at my location in Northern CA, details follow

 

5.7 11km WNW of Greenville, California 2013-05-23 20:47:07-07:00

About 40 miles away from me.

quake_mapCapture

Map: http://earthquake.usgs.gov/earthquakes/eventpage/nc71996911#summary

Whole cluster of quakes near Lake Almanor, odd.

quakeCapture3

12 quakes in that area last hour ranging from 2.5 to 5.7. 44 total if including lower than 2.5 magnitude Wonder if this is related to Mt. Lassen magma pool? Mt. Lassen is just 30mi to NW.

49 quakes now, note distance from cluster to Mt. Lassen. http://earthquake.usgs.gov/earthquakes/map/

quakeCapture4

  1. 3.0 8km WNW of Greenville, California 2013-05-23 22:46:56-07:00 0.0 km deep
  2. 2.0 7km NW of Greenville, California 2013-05-23 22:43:37-07:00 3.1 km deep
  3. 2.9 8km WNW of Greenville, California 2013-05-23 22:39:43-07:00 0.0 km deep
  4. 1.9 10km NW of Greenville, California 2013-05-23 22:37:21-07:00 9.7 km deep
  5. 2.0 8km WNW of Greenville, California 2013-05-23 22:28:26-07:00 8.8 km deep
  6. 1.9 11km WNW of Greenville, California 2013-05-23 22:27:16-07:00 2.5 km deep
  7. 3.1 13km SSW of Westwood, California 2013-05-23 22:24:42-07:00 0.0 km deep
  8. 2.3 10km WNW of Greenville, California 2013-05-23 22:23:26-07:00 1.3 km deep
  9. 2.4 8km WNW of Greenville, California 2013-05-23 22:19:34-07:00 0.9 km deep
  10. 2.9 9km NW of Greenville, California 2013-05-23 22:18:23-07:00 0.0 km deep
  11. 2.7 7km WNW of Greenville, California 2013-05-23 22:13:46-07:00 2.5 km deep
  12. 1.9 8km WNW of Greenville, California 2013-05-23 22:12:31-07:00 2.5 km deep
  13. 2.9 9km WNW of Greenville, California 2013-05-23 22:09:13-07:00 0.1 km deep
  14. 1.8 9km WNW of Greenville, California 2013-05-23 22:08:26-07:00 0.0 km deep
  15. 2.7 11km WNW of Greenville, California 2013-05-23 22:06:15-07:00 0.2 km deep
  16. 3.6 8km WNW of Greenville, California 2013-05-23 22:01:55-07:00 0.0 km deep
  17. 3.5 9km WNW of Greenville, California 2013-05-23 21:58:57-07:00 0.1 km deep
  18. 3.4 10km WNW of Greenville, California 2013-05-23 21:58:08-07:00 0.0 km deep
  19. 2.1 9km WNW of Greenville, California 2013-05-23 21:56:30-07:00 10.5 km deep
  20. 0.0 12km WNW of Greenville, California 2013-05-23 21:53:13-07:00 12.0 km deep
  21. 2.0 10km NW of Greenville, California 2013-05-23 21:52:24-07:00 7.2 km deep
  22. 2.2 10km WNW of Greenville, California 2013-05-23 21:49:49-07:00 0.2 km deep
  23. 0.0 13km WNW of Greenville, California 2013-05-23 21:45:52-07:00 4.1 km deep
  24. 2.8 10km NW of Greenville, California 2013-05-23 21:44:42-07:00 0.1 km deep
  25. 2.7 10km WNW of Greenville, California 2013-05-23 21:40:30-07:00 0.0 km deep
  26. 1.8 10km NW of Greenville, California 2013-05-23 21:35:03-07:00 7.0 km deep
  27. 2.1 9km WNW of Greenville, California 2013-05-23 21:34:22-07:00 2.5 km deep
  28. 2.2 11km WNW of Greenville, California 2013-05-23 21:34:00-07:00 6.2 km deep
  29. 2.4 11km WNW of Greenville, California 2013-05-23 21:32:56-07:00 1.3 km deep
  30. 1.7 9km SW of Westwood, California 2013-05-23 21:32:24-07:00 5.0 km deep
  31. 2.0 9km WNW of Greenville, California 2013-05-23 21:31:04-07:00 0.8 km deep
  32. 2.7 10km WNW of Greenville, California 2013-05-23 21:29:42-07:00 0.0 km deep
  33. 2.5 9km WNW of Greenville, California 2013-05-23 21:28:31-07:00 1.3 km deep
  34. 1.8 9km NW of Greenville, California 2013-05-23 21:27:38-07:00 0.0 km deep
  35. 2.6 10km WNW of Greenville, California 2013-05-23 21:25:19-07:00 0.0 km deep
  36. 2.0 12km SSW of Westwood, California 2013-05-23 21:24:43-07:00 1.7 km deep
  37. 2.3 10km NW of Greenville, California 2013-05-23 21:24:01-07:00 1.3 km deep
  38. 2.6 10km NW of Greenville, California 2013-05-23 21:23:40-07:00 5.1 km deep
  39. 0.0 11km WNW of Greenville, California 2013-05-23 21:23:06-07:00 6.9 km deep
  40. 2.0 10km NW of Greenville, California 2013-05-23 21:21:52-07:00 0.1 km deep
  41. 2.0 12km SSW of Westwood, California 2013-05-23 21:21:11-07:00 0.5 km deep
  42. 2.2 9km NW of Greenville, California 2013-05-23 21:18:31-07:00 1.3 km deep
  43. 2.2 10km NW of Greenville, California 2013-05-23 21:18:10-07:00 4.0 km deep
  44. 1.8 10km NW of Greenville, California 2013-05-23 21:16:32-07:00 17.6 km deep
  45. 2.3 10km WNW of Greenville, California 2013-05-23 21:15:15-07:00 0.2 km deep
  46. 2.4 13km WNW of Greenville, California 2013-05-23 21:10:24-07:00 0.7 km deep
  47. 2.8 10km NW of Greenville, California 2013-05-23 21:09:15-07:00 1.3 km deep
  48. 3.4 15km SE of Chester, California 2013-05-23 21:08:21-07:00 0.0 km deep
  49. 2.6 12km SSW of Westwood, California 2013-05-23 21:07:44-07:00 1.6 km deep
  50. 2.0 11km WNW of Greenville, California 2013-05-23 21:07:22-07:00 2.5 km deep
  51. 2.6 10km WNW of Greenville, California 2013-05-23 21:04:09-07:00 1.6 km deep
  52. 2.1 9km WNW of Greenville, California 2013-05-23 21:01:41-07:00 0.7 km deep
  53. 3.5 10km NW of Greenville, California 2013-05-23 20:55:30-07:00 0.0 km deep
  54. 2.2 9km NW of Greenville, California 2013-05-23 20:55:11-07:00 3.4 km deep
  55. 5.7 11km WNW of Greenville, California 2013-05-23 20:47:08-07:00 11.0 km deep
  56. 1.9 12km ENE of East Quincy, California 2013-05-23 04:17:24-07:00 1.5 km deep
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Mitchell Lane

Felt it in downtown Sacramento, CA. at 20:48

Yazmine

I’m trying to find anything too. Felt it roll in Chico, CA

OssQss
paul

Greenville, CA 5.7?

Cheryl C Penn Valley, ca

I felt something too after I realized the things shaking in my house was not a result of my dogs playing chase I know nothing if it was really an quake or where it was centered.

Robert Wykoff

Was felt here in Reno as well.

Yep, we felt it in Elk Grove, too. Maybe Lassen Eak is waking up. 🙂

Errrr…Peak. Dang iPad. 🙂

Ken Mitchell

Felt it here in Sacramento, too; just a gentle “bump”.

High treason

All caused by global warming of course.

kadaka (KD Knoebel)

http://www.idahopress.com/news/national/cars-in-water-after-bridge-collapse-on-i–north/article_14eebe84-c41b-11e2-ae5e-001a4bcf887a.html

Cars in water after bridge collapse on I-5 north of Seattle
Posted: Thursday, May 23, 2013 8:39 pm | Updated: 8:57 pm, Thu May 23, 2013.
MOUNT VERNON, Wash. – The Washington State Patrol is reporting that cars and some people are in the Skagit River this evening, and authorities are halting traffic after the Interstate 5 bridge between Mount Vernon and Burlington collapsed, reports the Skagit Valley Herald, the Idaho Press-Tribune’s sister paper.

Coincidence? Janice Moore reported at 7:31 WordPress-time (Pacific standard, not daylight?) she just heard it on the police scanner.
Now an earthquake at in California just a little bit later. Instantaneously later on geological times.
Could the earth in Seattle have moved enough to take down the bridge, which by the pic was just a section of it? How far does it have to separate at an expansion joint until the sections un-lap and a piece drops out?

Andrew Hatfield

Based on the fact that my Facebook page just exploded with posts about the quake… I feel safe to say I am the only person in Sacramento that did not feel the quake

james

Felt our chairs move in South Natomas.

Karl W. Braun

Here in Palo Alto, I didn’t feel a thing. Too used to them, I guess!

didn’t feel it in Petaluma

philincalifornia

Didn’t feel it in Oakland, and it’s a travesty I that couldn’t measure the tremors.
They’re clearly hiding down in the Hayward Fault.

Geeze, how many of us live in Northern California?!

philincalifornia

that I couldn’t even … even

Didn’t feel a thing way down here in San Diego county… only 500+ miles away.

kbray in california

Even…even…odd.

kadaka (KD Knoebel)

Solar question:
The primary memory unit remembers previous conversations here, where it was argued about a possible connection between strong solar periods and seismic events. But the actual numbers showed a negative correlation, seismic events were more likely during weak sun periods.
That was before the reconsidering of the sunspot counts and the eliminating of the modern-era Grand Solar Maximum.
Does the weak sun with strong seismic correlation still hold?

Gigi

Lots on proposed fracking in that area. Did it ever start?

Tiburon

seems to have rough correlation with coronal openings unshielded by magnetic fields on the sun, plus planetary alignments. electric universe stuff, of course.

Nick

I was sitting on a deck at a restaurant in Mill Valley this evening having dinner by the bay. I felt the deck move twice, thought earthquake, but was sure it was from footfalls. But I didn’t feel the footfalls any other time during the evening with lots of coming and going. I didn’t look at my watch, but I think it would have been around 7pm.

Here’s a link to Bloomberg’s story on the bridge collapse, with an enlargeable photo. Both lanes are in the drink. Bridge is listed as obsolete–built in 1955. Earthquake not likely a factor.
http://www.bloomberg.com/news/2013-05-24/bridge-collapse-in-washington-state-sends-cars-into-river.html

david

Felt it good here in Paradise,ca bout 80mi from greenville,ca

lucyinolivehurst

My H and I felt it here in Olivehurst. It was a mild rolling sensation, not a jolt. Lasted long enough for him to come into the room where I was, comment on it, stand with me a couple of seconds, then go into the living room… so maybe 20 seconds. Surprised we felt it as strong as we did so far from the epicenter.

kadaka (KD Knoebel)

Of course there is something important here we must not lose sight of.
Was the resident member of the Union of Concerned Scientists, the honorable Professor Kenji Watts, able to detect it before it officially happened?

Betapug

Skagit River bridge was clipped by an overheight vehicle going south. Hopefully only 3 injured.

intrepid_wanders

Good grief Roger, Bloomberg? 😉
http://blogs.seattletimes.com/today/2013/05/bridge-collapses-on-interstate-5-over-skagit-river/
Three vehicles, no fatalities. Amazing.

Janice Moore

Hey, Kadaka, I’m back on line. Have had my eyes glued to local TV for the past 2.5 hours. No earthquake felt where I live, about 2 miles from the collapsed bridge (or reported — Univ. of Wash. seismology dept. is first class, don’t want to figure out now how to check their latest readings — uw.edu.???).
Glad you are okay, A-th-y and ALL of you Californians. If you guys down there are like us (who grew up here, anyway) up here, earthquakes are not a big deal unless fairly big, and, even then, not that big a deal unless it were something like the 1989 one in San Fran area. I had to chuckle when I read a post by a woman who lives near or in Oklahoma City (posted yesterday or so) who said she would MUCH prefer to risk riding out a tornado to an earthquake! I guess its that old feeling secure in your old neighborhood even after it has really become quite dangerous, not that I believe there is a significant risk of a BIG earthquake where I live. Like my grandma who stayed in her home of over 60 years into her 90’s. Cops would chase bad guys through her back yard, she would hear of lots of crime a few blocks from her, but she felt perfectly safe.
And, she was, of course. If it’s not your time to go, it is not your time to go. And when it is, it is. No use worrying about it. This evening, a girlfriend who lives elsewhere now, called to see if we were all okay up here. Her brother and sister-in-law drove across I-5 bridge just one hour before it collapsed. I drove across it yesterday afternoon. God is in control.
What a blessing that the collapse happened around 7PM on a day when it was light until around 9:30PM. Another blessing: no fatalities. All three (that is ALL there were!) people whose cars crashed into the Skagit River were rescued and are in stable condition in the hospital.
Sorry so long. I could give you all a bunch of technical details about the bridge, the river, and the possibility a tractor-trailer’s striking a steel truss was a major contributing cause, but I’ll end here. If you want more details, here’s a link to one of the Seattle TV stations, KING TV:
http://www.king5.com/news/local/Report-I-5-bridge-collapses-over-Skagit-River-cars-in-water-208758631.html
I would also be happy to answer any questions — just thought I’d better end this post.
Oh, note, it IS nearly full moon…. . Hmm. Gravitational pull on tractor-trailer driver’s mind (or another vehicle who forced him too far to the right (that vehicle would be long gone — the trucker made it off just before collapse). I’ve noticed a higher incidence of risk-taking on the road at full moon times… . Perhaps, just projecting an expectation.
(and if you want to know how to pronounce “Skagit” — it rhymes with “badge it”)

intrepid_wanders

Opps, a fouth person missing.

It was felt in the Delta south of West Sac. 90 year old Mom got all excited said her rocking chair went in the wrong direction. (we didnt ask). She was the only one though.

USGS had totally ruined their earthquake pages. When you went to the information on an event, there used to be a “historical seismisicty” map but now once you figure out how to navigate to the event summary, that map is no longer available.
USGS new earthquake map sucks.

Tamara

We live in Weed California. All my hanging plants started swinging and my parrot went nuts in her cage. Both my dogs also were freaking out.

An area caller on the Coast-to-Coast AM said that an over-sized load side impacted the Skagit bridge structure. To allow for thermal expansion, bridges are designed with one end “pin” connection and the other “roller”, both resting on bent frame or columns and beams. There is minimum free play under any failure mode. Astrophysicist, Dr Piers Corbyn has a hypothesis on solar/tectonic interaction, but non grata in some circles.
REPLY: OH PLEASE. Piers has no useful opinion on this issue. Heavy Oversize Load. Hit bridge. Bridge Collopses. End of Story – Anthony

Ignore the depth reports on those quakes. There are no nearby sensors so the depth is only estimated with a +/- that is larger than the reported depth (something like +/- 36km)

I am waiting for Barbara Boxer to blame it on “Climate Change”

Janice Moore

Not directly on point (more for Washington State area), but FWIW, here’s the link for U. of Wash. seismology lab (I think — I guess the pnsn is located at UW):
http://www.pnsn.org/earthquakes/recent

grumpyoldmanuk

Following the precautionary principle, POTUS will order the immediate cessation of all fracking operations in the US and appeal to the UN for support from the rest of the world. Fracking will not re-commence until tests proving the safety of the operation have been carried out.
/sarc

Janice Moore

@Pissed Off Voter (me too!), LOL, don’t hold your breath. It’s pretty hard to tell when an earthquake is happening when you have a bunch of rocks rolling around inside your head. Pretty hard to tell much of anything, as a matter of fact.
Wow. Like, WOW, California, Boxer AND Pelosi??!!!
(ahem, well, not that it was my fault, but guess I have no cause for criticizing with our lovely Patti Murray (thought it was really neat that Osama B.L. opened day care centers) and her partner in crime, (I just forgot her name, oh, yeah) Cantwell (toooo funny, huh? heh, heh). There sure seems to be a connection between salt water and wackos — the bulk of them tend to migrate to the coasts of our great land. Something to do with lemmings?
Sorry for getting out some of my tension of the past 3 hours by typing like crazy! Blah, blah, blah…

kadaka (KD Knoebel)

Whole cluster of quakes near Lake Almanor, odd.
12 quakes in that area last hour ranging from 2.5 to 5.7. 44 total if including lower than 2.5 magnitude Wonder if this is related to Mt. Lassen magma pool?

Lake Almanor is a large artificial lake, aka reservoir, surrounded by other artificial reservoirs.
Extra water saturating the ground underneath, the extra weight of the water especially at the lake…
The recent national talking of sinkholes and their prevalence, has me wondering how much of that seismic activity could have been subsidence related. Besides, doesn’t California have forgotten old mines that can collapse and show up on seismographs, like as in Pennsylvania?

I just heard the latest news on this from KIRO radio in Seattle, which has a reporter on the scene. The collapse was caused, according to an eye-witness, by an oversized truck traveling in the right lane that struck an overhead beam on the bridge that it would have missed if it had been in the left lane.
Skagit county authorities report no fatalities; three people hospitalized, none seriously hurt. Bridge may be repairable within 90 days.

RACookPE1978

Request permission to edit the title of this once the epicenter of the quake and (rough) magnitude are either more clear, or known.
“Just an earthquake in California” doesn’t tell the rest of much in the rest of the country. 8<)
Judging by first hand reports and area, looks like a Mag 4 to 4.5 near Sacramento?

Janice Moore says:
May 23, 2013 at 10:17 pm

Hey, Kadaka, I’m back on line. Have had my eyes glued to local TV for the past 2.5 hours. No earthquake felt where I live, about 2 miles from the collapsed bridge (or reported…”

The nearest seismic activity is about 25km away, a small 2.5 quake with minimal acceleration at that distance. (less than MMI 1.83 using the West Coast model)

There are no known faults that I can find near that quake area. That area is in a generally geologically active volcanic area but no recent eruptions have happened in the general area of this quake series that I am aware of. The person to ask would be Erik Klemetti over at the Eruptions blog on Wired Science. He is rather expert on the Lassen area and will be doing research there most of this summer.

Janice Moore

Geo, I just KNEW you were hanging around here, heh, heh. Thanks for the info..