Quake Watch 2014

Napa, N. California elapsed time 38:50:57 (hh:mm:ss)

not many aftershocks for a 6.0Mw????
summary
mag1= 43 , mag2= 30 , mag3= 2
mag4= 0 , mag5= 0 , mag6= 1
total= 76, total energy released= 15,088.709 TTNT

left click image for interactive map, right click "view image" for full size

a reply to: muzzy

The lack of larger (mag 4 range) aftershocks is worrying, But I see one rolling in on GEE now.
Waiting for USGS...

Nice map work, as usual, Muzzy. Thanks.
Hey Muzzy, would this map work as a base for your Iceland projects? I like it because it lists all of the place names used as reference by the IMO in their quake tables


Mag 3.9 Largest aftershock to date, I believe.

a reply to: Olivine

I was wondering about the aftershocks as well.
If you look almost anywhere else on the USGS global map at the aftershocks to the bigger ones,
most have aftershocks that are about a point lower and then smaller and smaller..

I have not seen any big aftershocks.

Could this be because this was centered between two fault lines and not on a known active fault line?
(seems to me someone said it was an ancient fault line, but I could be mistaken)

a reply to: Darkblade71

Here is a good blog post from Scientific American, that reports on the findings of geology students from UC Davis.

They report that the Brown's Valley section of the West Napa fault was responsible, and that:

The rupture zone they found is right about half a kilometer (.3 mi) wide, 16 km (10 mi) long, and had a maximum slip of 25 centimeters (9 inches).

So, you're correct in thinking that this was a fault zone, and it very well could be why we haven't seen any moderate sized aftershocks.

The handful of aftershocks at the northern end of the West Napa fault (just S of Yountville on the image below), may be signalling more movement is possible still further north of the mainshock. This is just my amateur opinion.

(click for larger image)

image source

Just checked and all of the USGS Heliplots are unavailable.
ANSS Backbone Heliplots
GSN Heliplots
Does anyone know why this happens?

a reply to: Olivine

thanks, but as I said on Volcano Watch it won't open for me, I have Adobe Flash Player installed

a reply to: muzzy
Hmm, that's strange that it is prompting you. The map is interactive, so I don't believe there is a .pdf available. Bummer.



a reply to: whatnext21
I'm not sure what is going on, but off and on today, the US network stations and the TA stations have gone kaput in GEE, too. Someone must be doing some meddling behind the scenes

a reply to: Olivine
this one is pretty good, its designed for I-pad but worksgreat on the laptop, 7 types of map available
atlas.lmi.is...

every country should have the same.

Downgraded to a 4.8

M5.0 - 44km ESE of Middleton Island, Alaska
2014-08-27 06:10:19 UTC

Location

59.344°N 145.559°W depth=13.0km (8.1mi)
Nearby Cities

44km (27mi) ESE of Middleton Island, Alaska
319km (198mi) SE of Anchorage, Alaska
330km (205mi) SE of Knik-Fairview, Alaska
607km (377mi) W of Whitehorse, Canada
620km (385mi) S of Badger, Alaska

earthquake.usgs.gov...

I don't like that one at all.


The downgrade doesn't make me feel better..lol

originally posted by: PuterMan

@Olivine: Add Cali 6 and NW Tremor and what do you get?? W8 - love it (see below) (Oh I went widescreen for the first time as well having resisted for years)

Puterman, I've no clue what we will get, but the tremor is still going strong.
The PNSN graphs seem to have a glitch at the moment, the only graphics that show are the density maps. This image shows the past 18 days of activity.

source
A full 36.9 hours with 635 epicenters just for yesterday.
Looking at the spectrograms for today, the deep tremors are still popping away. (link is for northern California, all other ETS regions are linked in the drop-down)


I'm glad to read that you love Win8. This weekend I will be purchasing a new compy--my significant other has graciously let me borrow his for the past few days because he noticed I couldn't keep my eyes off the Napa/Iceland happenings. Sweetheart, that man, for understanding my addiction.

M3.9 - West of Vancouver Island 2014-08-29
17:31:53 UTC

Location

50.657°N 139.415°W depth=15.1km (9.4mi)
Nearby Cities

622km (386mi) SW of Masset, Canada
739km (459mi) WSW of Prince Rupert, Canada
848km (527mi) WSW of Terrace, Canada
909km (565mi) SSW of Juneau, Alaska
1009km (627mi) W of Campbell River, Canada

earthquake.usgs.gov...

A long ways out, but just in a weird spot.

M5.0 - 197km ENE of Norman Wells, Canada
2014-08-29 18:37:29 UTC

Location
65.644°N 122.656°W depth=2.2km (1.4mi)

Nearby Cities
1. 197km (122mi) ENE of Norman Wells, Canada
2. 538km (334mi) NW of Yellowknife, Canada
3. 828km (514mi) NE of Whitehorse, Canada
4. 1021km (634mi) NNE of Juneau, Alaska
5. 1051km (653mi) N of Fort St. John, Canada


earthquake.usgs.gov...


This seems unusual, not often I see quakes in this part of the world and shallow too... What do our resident quake experts make of this?

muzzys rule
whenever the TTNT for the 24 hour period falls below 10, there is a M5 within 6 days

so hows it stacking up for August 2014?

1st Aug=9TTNT, 4th Aug M5, within 3 days
5th Aug =6TTNT, 6th Aug M5, within1 day
10th Aug =10TTNT, 14th Aug M5, within 4days
15th Aug =7TTNT, nothing
20th Aug =6TTNT, 25th Aug M5, within 5days
28th Aug=7TTNT, 29th Aug M5, within1 day

so 1/6 or 83.3% of the time it works out

show me any other method of prediction with 83% accuracy?

none!
only applies for NZ though
most of the 5's are north of the main islands, in the Kermadec's or between, seems to be the only area of action this period

go with this link as it will update when I renew it
Aug 2014 energy and numbers counts

Mother Earth is so active at the moment... I'm literally on pins when I open USGS and RSOE in the mornings.

Quake in Alaska though not as shallow as the one in Canada yesterday.

M5.1 - 60km NW of Ester, Alaska
2014-08-31 03:06:57 UTC
Location

65.155°N 148.983°W depth=15.5km (9.6mi)

Nearby Cities

60km (37mi) NW of Ester, Alaska
67km (42mi) NW of College, Alaska
72km (45mi) WNW of Fairbanks, Alaska
81km (50mi) WNW of Badger, Alaska
862km (536mi) NW of Whitehorse, Canada

Hmm, small swarm in AK, the biggest being a 5.1, and most recent being a 4.6 in magnitude. Might we hear a bit more from the region, or is this liable to calm down?

4.6 66km NW of Ester, Alaska 2014-08-31 12:24:57 UTC 16.0 km
3.2 54km NW of Ester, Alaska 2014-08-31 09:33:28 UTC 12.1 km
3.5 56km NW of Ester, Alaska 2014-08-31 08:10:54 UTC 18.9 km
2.6 68km ENE of Manley Hot Springs, Alaska 2014-08-31 07:39:19 UTC 7.8 km
3.0 48km NW of Ester, Alaska 2014-08-31 04:52:49 UTC 13.7 km
2.7 57km NW of Ester, Alaska 2014-08-31 04:01:29 UTC 11.9 km
2.8 56km NW of Ester, Alaska 2014-08-31 03:26:15 UTC 5.9 km
2.6 40km NW of Ester, Alaska 2014-08-31 03:16:16 UTC 26.9 km
2.5 61km NW of Ester, Alaska 2014-08-31 03:15:55 UTC 16.8 km
2.5 61km NW of Ester, Alaska 2014-08-31 03:13:38 UTC 9.4 km
5.1 60km NW of Ester, Alaska 2014-08-31 03:06:57 UTC 15.5 km

Via USGS

Now it's up to 275 quakes of all magnitudes,
in the last 24 hours, in Ester, Alaska!

What's going on up there?
Any volcanoes in the area???
WOQ

a reply to: wasobservingquietly

Interesting that this cluster of quakes in Alaska seems just a bit southeast of some of the most previous quake swarms in central AK from a few months ago. It seems like they are creeping across the state out towards the kenai peninsula.

Just some of my own random thoughts based on a path I think I might be seeing.

Currently watching ABC Live Quake Cam and have noticed the needle vibrating more than it usually does wondering if this has happened before or is it just malfunctioning.

reply to: GoShredAK
Just looked up some info.
Closest volcano is Buzzards Creek, 64.061*N -148.432*W.
Coordinates of Ester's quakes, 65.155*N -148.983*W.
Even more interesting...the latitude of all the activity in Iceland right now:
64.723*N !!!

Hmmm...
WOQ

a reply to: wraith257

Can't get it to load on my phone to look at it! ☹
WOQ