Quakes – Misc.

OK, we’ve had a bunch of odd little ‘quake storms’ often around old volcanic structures. R. de Haan, George, Scarlet Pumpernickel, Jason Calley and others have been pointing them out in ‘tips’, so I guess it’s time to make a ‘quake posting’ and move the discussions to a discussion thread and out of ‘tips’…

First up, the R. de Haan El Hiero Volcano Canary Islands tip

There is a very nice map in the article he linked at:

http://earthquake-report.com/2011/07/28/earquake-activity-below-el-hierro-volcano-canary-islands-spain/

That article says it reached 700 events as of yesterday. That is rather a lot of ‘events’, even if small. (Most, per the article, are around 2 +/- 1/2 )

So the big question is, what’s happening here?
It is possible that there is magma on the move at depth, perhaps moving into a magma chamber.
Does this mean that there will be an eruption? Maybe, maybe not.
The majority of magma intrusions do not reach the surface, and as has been seen elsewhere, in the past, activity can cease at anytime.
As of yet (to my knowledge) there have been no other signs of moving magma at the surface such as ground deformation or increased gas emission, although GPS antenna have been set up by officials at the Canary Islands.
For now it is too early to tell what (if anything) will happen, so keep watching.
If you would like to follow these earthquakes in more detail or look at the raw data, visit here .

The ‘visit here’ link goes to Spanish site, I think. http://www.02.ign.es/ign/layoutIn/sismoListadoTerremotos.do?zona=1&cantidad_dias=10

The USGS map is not showing anything, but I think this is due to a 2.5 magnitude ‘cut off’. Hmmm…. That tends to make the USGS maps particularly poor for early volcanic quake storm detection where there are a mass of low magnitude quakes…

If this turns into a Real Volcano ™ then we could have some interesting tidal waves on the East Coast… Oh, wait I am on the East Coast now… well, that’s ‘not good’! ;-)

Jason and Scarlet have pointed to the area around Southern California. As I’m not in California any more, that’s of no real concern… Oh, wait my KID is in Southern California now … well, maybe that’s an issue too… ;-)

At any rate, the comments here: https://chiefio.wordpress.com/tips/#comment-20528 and here https://chiefio.wordpress.com/tips/#comment-20637 have videos of what looks like a dust or steam venting event. Personally, if it isn’t red, glowing, and melting Chevys, then it’s just normal ‘volcanic field events’ for the area, IMHO. While I’d love to see a volcanic fissure open up and demonstrate how the subducted spreading zone is still spreading, I think it will take a while for that to happen.

I’m not seeing much on the California map (down below). Mostly just the “usual” on the larger faults. There’s a tiny it of action on the line up past Mammoth toward Nevada (where we had a quake event under some old volcanoes) but nothing major (yet)…

Nice action on the Hayward / Calaveras / Rodgers complex with the slippage clearly moved inland from the N. San Andreas. (Berkeley and Oakland are toast… it’s just a question of “when”… which could be ‘in 400 years’… or could be ‘tomorrow’…) The action around The Geysers is the most intriguing as it is in keeping with the ‘quakes near volcanic stuff’ theme.

The Pisgah crater is between Barstow and Needles (Needles being just about on the Nevada border with Arizona and Barstow being at the start of the Mojave) so it is in the big empty zone with no quake activity on the California map below.

I’ve zoomed in on where it ought to be and I’m not seeing much:

Barstow to Needles Mojave quake map - live

Barstow to Needles Mojave quake map - live

As the caption for this runs down to “1” scale events, even a large dump truck dumping a load ought to show up …

We do see some 1 scale events, but spread out over various clearly marked fault zones or near them.

If you go to the active map, you can use the wedges on each side to scroll around and / or click on a dot to get quake info.

But move up a bit on the spreading zone, and there is an interesting chain of dots (all small ones) on the approach to Mammoth “lakes”…

Quakes 29 July 2011 Mammoth Lakes 118-37

Quakes 29 July 2011 Mammoth Lakes 118-37

This is the static capture. Below is a live map.

Mammoth "Lakes" and approaching fault system - live map

Mammoth "Lakes" and approaching fault system - live map

My “take” on all this is just that: As we’ve had a bunch of major subduction events on the Pacific Plate, that releases some of the ‘back pressure’ on spreading zones as far away as the Atlantic Mid-Ocean Ridge, and we see various magmatic events start to ooze some. Enough for a volcano? Who knows… or when…

But as the subduction events ‘clear the way’, the plates can slide over and then the spreading zones ought to ‘do what they do’ in places like Iceland, Canaries, and even Barstow to Death Valley.

Further down in comments, there was a pointer to a cluster in Mexico (in the Gulf of California).

It looks to me like a 5, 4, and smaller cluster and no followthrough, right on the spreading zone. I’d expect more action to happen further north as a consequence “in a few weeks”. If the ‘more spreading’ thesis and the ‘displacement propagates north” thesis are correct, it could get interesting in Southern California ;-)

Quakes 29 July 2011 Gulf of California 250_25

Quakes 29 July 2011 Gulf of California 250_25

At any rate, I’m left wondering if anyone has ever done a very long term study of percent quakes on spreading zones vs percent on compression faults to see if there is a pattern of “subduction then spreading quakes” followed by a long “compression zone quakes and no big subduction events”, then back to “more subsections followed by spreading zone events”. Seems like a reasonable “oscillator” thesis to explore to me…

I note in passing that we’ve picked up a more recent 5.3 even in Central Alaska, about where volcanoes are located…

Magnitude 5.3 - CENTRAL ALASKA
2011 July 28 14:00:00 UTC

This event has been reviewed by a seismologist.
Magnitude  5.3
Date-Time
Thursday, July 28, 2011 at 14:00:00 UTC
Thursday, July 28, 2011 at 06:00:00 AM at epicenter
Time of Earthquake in other Time Zones
Location  62.050°N, 151.290°W
Depth  81.6 km (50.7 miles) set by location program
Region  CENTRAL ALASKA
Distances
19 km (12 miles) N (356°) from Skwentna, AK
46 km (29 miles) SW (218°) from Petersville, AK
57 km (35 miles) WSW (240°) from Trapper Creek, AK
125 km (78 miles) NW (320°) from Anchorage, AK
Location Uncertainty
horizontal +/- 0.3 km (0.2 miles); depth fixed by location program
Parameters
NST= 78, Nph= 84, Dmin=14.7 km, Rmss=0.58 sec, Gp= 47°,
M-type=local magnitude (ML), Version=2
Source
Alaska Earthquake Information Center
Geophysical Institute, University of Alaska Fairbanks
Event ID  ak10281084 

Here are the Mexican 5.0 data for comparison:

Magnitude 5.0 - GULF OF CALIFORNIA
2011 July 26 19:40:28 UTC

This event has been reviewed by a seismologist.
Magnitude  5.0
Date-Time
Tuesday, July 26, 2011 at 19:40:28 UTC
Tuesday, July 26, 2011 at 01:40:28 PM at epicenter
Time of Earthquake in other Time Zones
Location  25.051°N, 109.582°W
Depth  12.5 km (7.8 miles)
Region  GULF OF CALIFORNIA
Distances
100 km (62 miles) SW of Los Mochis, Sinaloa, Mexico
124 km (77 miles) NE of La Paz, Baja California Sur, Mexico
149 km (92 miles) WSW of Guamuchil, Sinaloa, Mexico
961 km (597 miles) SSE of PHOENIX, Arizona
Location Uncertainty
horizontal +/- 15.4 km (9.6 miles); depth +/- 6.9 km (4.3 miles)
Parameters
NST=308, Nph=308, Dmin=155.8 km, Rmss=1.24 sec, Gp=119°,
M-type=body wave magnitude (Mb), Version=5
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID  usc00054hv

And there was this tasty 6.7 “South of the Fiji Islands” that could also be the start of something interesting. There has been a lot of persistent activity in the area of that Island region… h/t to George in this comment: https://chiefio.wordpress.com/tips/#comment-20676 (and I think that covers all the ‘tips’ on quakes… If I missed someone, well, let me know…)

Magnitude 6.7 - SOUTH OF THE FIJI ISLANDS
2011 July 29 07:42:23 UTC

Versión en Español
Details
Maps
Scientific & Technical
Tsunami
Earthquake Details

This event has been reviewed by a seismologist.
Magnitude  6.7
Date-Time
Friday, July 29, 2011 at 07:42:23 UTC
Friday, July 29, 2011 at 07:42:23 PM at epicenter
Time of Earthquake in other Time Zones
Location  23.651°S, 179.822°E
Depth  521.7 km (324.2 miles)
Region  SOUTH OF THE FIJI ISLANDS
Distances
631 km (392 miles) SSE (167°) from SUVA, Fiji
1547 km (961 miles) NNE (20°) from Auckland, New Zealand
Location Uncertainty
horizontal +/- 14.1 km (8.8 miles); depth +/- 6.3 km (3.9 miles)
Parameters
NST=619, Nph=660, Dmin=659 km, Rmss=1.01 sec, Gp= 14°,
M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=A
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID  usc00055wy

(It has just popped another red one as I’m typing…)

Quakes near Raoul 180_-25

Quakes near Raoul 180_-25

Just to the right of that view, more on the fault:

Quakes Near Raoul 185_-25

Quakes Near Raoul 185_-25

And, of course, Japan and Chile continue to jiggle and dance. But is it ‘new stuff’ or just long duration aftershocks of their 9 class events…

Southern Hemisphere

A view of Earthquakes from the South Pole

A view of Earthquakes from the South Pole

Original Image with Clickable Details

Northern Hemisphere

North Polar Earthquake Map

North Polar Earthquake Map

Original Image with Clickable Details

Asia and Russia

Asia Quake Map

Asia Quake Map

Original Image with clickable areas

Australia / New Zealand

This is a map of the Australia / Indonesia / New Zealand area:

Australia / Indonesia / New Zealand Quake Map

Australia / Indonesia / New Zealand Quake Map

Original with clickable regions to zoom in

North America

North America and Mid Atlantic Ridge Quake Map

North America and Mid Atlantic Ridge Quake Map

Original with clickable details

And remember, I have a dedicated CSZ page with closeups

California Map

Here is an alternative view of things with the fault lines highlighted:

California Quakes with fault lines

California Quakes with fault lines

Original Image
en.vedur.is/earthquakes-and-volcanism/articles/nr/2180

Map of Plates

You can see it is where plates collide here:

Plates Of The World

Plates Of The World

Original Image, and with other language options.

Some Volcano Stuff

This page:

http://pangea.stanford.edu/~dsinnett/Pages/Links.html has a nice collection of links to volcano monitor pages. Just click the pictures for the different volcano observatories.

The Smithsonian page:

http://www.volcano.si.edu/reports/usgs/

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About E.M.Smith

A technical managerial sort interested in things from Stonehenge to computer science. My present "hot buttons' are the mythology of Climate Change and ancient metrology; but things change...
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11 Responses to Quakes – Misc.

  1. vukcevic says:

    BTW, according to my count yesterday was the ‘quakiest’ day since the Japan’s big one. http://www.vukcevic.talktalk.net/EQr.htm

  2. R. de Haan says:

    @E.M Smih, “If this turns into a Real Volcano ™ then we could have some interesting tidal waves on the East Coast… Oh, wait I am on the East Coast now… well, that’s ‘not good’! ;-)”

    As far as I know, the tsunami scare is not related to El Hielo Volcano but to Cumbre Vieja Volcano, La Palma.
    http://en.wikipedia.org/wiki/Cumbre_Vieja

  3. Catherine Clark says:

    Ummm…..they would not be “tidal” waves, but seismic waves – tsunami waves.

  4. R. de Haan says:

    @Catherine Clark,

    The thing is that a BBC Horizon program (who else?) in the year 2.000 came up with a scenario of a mega tsunami originating from the collapse of “unstable flank” of Cumbre Veija volcano into the ocean.
    However this report has been debunked by new scientific research.

    Please read http://en.wikipedia.org/wiki/La_Palma
    Tsunami Cenarios La Palma.

  5. Pascvaks says:

    @R. de Haan

    ?You mean the Sceptics actually won one?

    I liked that program. Made me feel smart. Thought I’d picked a good place to hide till the ‘End of the World’. Oh well, too hot and humid in Florida anyway. Ain’t life a beach?

  6. R. de Haan says:

    @Pascvaks,
    “?You mean the Sceptics actually won one?”

    If Wikipedia says so…(LOL) They did win one.

  7. E.M.Smith says:

    Canada gets a 4.0 in the middle of nowhere? Sheesh… and Japan pops another 6.x… If the frequency keeps up, at some point it’s going to start looking like foreshocks of something yet to come…

    @Vukcevic:

    There’s always tomorrow ;-)

    @Catherine Clark:

    It is common in the vernacular to call tsunami “tidal waves”. At least in American English. I never heard the word tsunami until well into college years.

    Rather like Egg Plant has no eggs in it and noses run while feet smell…

    @R. de Haan:

    I was presuming that any volcano exploding in the ocean ought to cause some waves… and / or shake up their neighbors… not ‘megatsunami’ but just the ordinary kill a few hundred to thousand kinds…

    Per Vancouver: Yeah, it’s likely to be “toast” like Portland / Seattle when the Cascadia lets loose.

  8. Catherine Clark says:

    @ e.m. smith:
    I know that the common vernacular is tidal wave, but I figured on this board we would know and use the correct phrase. I have been known to correct my local news station when they incorrectly use the common vernacular – they might as well know what it really is and that is has nothing to do with the tides.

    @R. de Haan:
    I am well aware of what the “experts” say about this, but it does go on to say that there has been no mega-tsunami in “recorded history” but we all know that recorded history as opposed to earth history are two very different animals. Some geologists didn’t belive that Cascadia could do anything until they started studying the shoreline and deep sea deposits and got a rude awakening. The could/could not be a fault line – sure the evidence does not seem to be there, but has any research such as the type that has been done on the CSZ actually been done to ascertain this?

  9. Catherine Clark says:

    Oops, I meant “the LINE could/could not be a fault line” – typing too fast. I also misspelled believe, LOL

  10. E.M.Smith says:

    Hmmm…. Active down around Australia / N.Z. and then this one up near Japan / Russia…

    Magnitude 6.3 – KURIL ISLANDS
    2011 August 04 13:51:36 UTC

    Earthquake Details

    * This event has been reviewed by a seismologist.

    Magnitude 6.3
    Date-Time

    * Thursday, August 04, 2011 at 13:51:36 UTC
    * Friday, August 05, 2011 at 01:51:36 AM at epicenter
    * Time of Earthquake in other Time Zones

    Location 48.784°N, 154.835°E
    Depth 49 km (30.4 miles)
    Region KURIL ISLANDS
    Distances 230 km (142 miles) SSW of Severo-Kuril’sk, Kuril Islands, Russia
    542 km (336 miles) SSW of Petropavlovsk-Kamchatskiy, Russia
    659 km (409 miles) NE of Kuril’sk, Kuril Islands
    1907 km (1184 miles) NE of TOKYO, Japan
    Location Uncertainty horizontal +/- 15.8 km (9.8 miles); depth +/- 8.5 km (5.3 miles)
    Parameters NST=481, Nph=487, Dmin=522.1 km, Rmss=0.69 sec, Gp= 47°,
    M-type=regional moment magnitude (Mw), Version=6
    Source

    * Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)

    Event ID usc00058wy

    Even a couple of 3.x+ scale in / near California…

    Looks to me like it’s in “volcano country” and so in a few years we ought to see some more smokers…

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