Quakes Catch Up

We’ve had a couple of ‘big ones’ and I’d not commented. It’s worth a comment.

One was in the Kermadec Islands. A 7.4 sized event.

Magnitude 7.4 – KERMADEC ISLANDS REGION
2011 October 21 17:57:16 UTC

Earthquake Details

This event has been reviewed by a seismologist.

Magnitude 7.4
Date-Time

Friday, October 21, 2011 at 17:57:16 UTC
Saturday, October 22, 2011 at 05:57:16 AM at epicenter
Time of Earthquake in other Time Zones

Location 28.998°S, 176.183°W
Depth 32.9 km (20.4 miles)
Region KERMADEC ISLANDS REGION
Distances 169 km (105 miles) E of Raoul Island, Kermadec Islands
375 km (233 miles) NE of L’Esperance Rock, Kermadec Islands
877 km (544 miles) S of NUKU`ALOFA, Tonga
1215 km (754 miles) NE of Auckland, New Zealand
Location Uncertainty horizontal +/- 14.1 km (8.8 miles); depth +/- 2.7 km (1.7 miles)
Parameters NST=741, Nph=742, Dmin=172.5 km, Rmss=0.68 sec, Gp= 11°,
M-type=”moment” magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=8
Source

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

Event ID usb0006b6p

We’ve seen a lot of events in that area (near Vanuatu). So many I’m getting jaded about it. The reality is that there ought to be more attention to it, not less. Multiple 7.x events inside a year or two? It’s saying something.

The next one was in Turkey.

Many deaths (largely due to building codes). Still, a major quake at 7.2 on the scale:

Magnitude 7.2 – EASTERN TURKEY
2011 October 23 10:41:21 UTC

Earthquake Details

This event has been reviewed by a seismologist.

Magnitude 7.2
Date-Time

Sunday, October 23, 2011 at 10:41:21 UTC
Sunday, October 23, 2011 at 01:41:21 PM at epicenter
Time of Earthquake in other Time Zones

Location 38.628°N, 43.486°E
Depth 20 km (12.4 miles) set by location program
Region EASTERN TURKEY
Distances 16 km (9 miles) NNE of Van, Turkey
118 km (73 miles) N of Hakkari, Turkey
127 km (78 miles) SSE of Agri (Karakose), Turkey
929 km (577 miles) E of ANKARA, Turkey
Location Uncertainty Error estimate not available
Parameters Nph=0, Dmin=0 km, Rmss=0 sec, Gp= 0,
M-type=centroid moment magnitude (Mw), Version=1
Source

USGS NEIC (WDCS-D)

Event ID usb0006bqc

I also find it a bit odd that these two are about 1/3 of the world away from each other. Like 2/3 of a pattern…

East Bay San Franciso Area

Which brings us to the East Bay of San Franciso Bay Area. Not much news about it, but they had a set of two quakes that were big enough to feel. 3.x and 4.x sized. On the fault system I worry about most. Also the “fast and hold” quick break just smells like a ‘pre-shock’ to me. So folks living in Berzerkely and Oakland ought to be getting prepared for a Big One. If it doesn’t come this time, it will soon enough anyway.

Magnitude 4.0 – SAN FRANCISCO BAY AREA, CALIFORNIA
2011 October 20 21:41:04 UTC

Earthquake Details

This event has been reviewed by a seismologist.

Magnitude 4.0
Date-Time

Thursday, October 20, 2011 at 21:41:04 UTC
Thursday, October 20, 2011 at 02:41:04 PM at epicenter
Time of Earthquake in other Time Zones

Location 37.857°N, 122.253°W
Depth 8.1 km (5.0 miles)
Region SAN FRANCISCO BAY AREA, CALIFORNIA
Distances

3 km (2 miles) SE (131°) from Berkeley, CA
4 km (2 miles) NE (52°) from Emeryville, CA
4 km (3 miles) NNW (334°) from Piedmont, CA
7 km (4 miles) NNW (343°) from Oakland, CA

Location Uncertainty horizontal +/- 0.1 km (0.1 miles); depth +/- 0.1 km (0.1 miles)
Parameters Nph=325, Dmin=1 km, Rmss=0.17 sec, Gp= 14°,
M-type=regional moment magnitude (Mw), Version=E
Source

California Integrated Seismic Net:
USGS Caltech CGS UCB UCSD UNR

Event ID nc71667366

All this as the moon heads toward “new”, so tides are strong. Oh, and an “honorable mention” for Japan too:

Japan 6.1

Magnitude 6.1 – HOKKAIDO, JAPAN REGION
2011 October 21 08:02:37 UTC

Earthquake Details

This event has been reviewed by a seismologist.

Magnitude 6.1
Date-Time

Friday, October 21, 2011 at 08:02:37 UTC
Friday, October 21, 2011 at 05:02:37 PM at epicenter
Time of Earthquake in other Time Zones

Location 43.889°N, 142.477°E
Depth 185 km (115.0 miles)
Region HOKKAIDO, JAPAN REGION
Distances 17 km (10 miles) NE of Asahikawa, Hokkaido, Japan
121 km (75 miles) NNW of Obihiro, Hokkaido, Japan
131 km (81 miles) NE of Sapporo, Hokkaido, Japan
941 km (584 miles) NNE of TOKYO, Japan
Location Uncertainty horizontal +/- 13.3 km (8.3 miles); depth +/- 5.3 km (3.3 miles)
Parameters NST=611, Nph=645, Dmin=26.7 km, Rmss=0.63 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 usb0006b09

Not much in the context of the 9.x scale they had, but still, it’s big enough to shake things. Nice sized square on the map too.

It does look like there is more overall quake activity recently than there was a few years ago. Like maybe something has changed. The quake map of California is impressively covered in quakes, some of them out in the volcanic fields areas in Nevada too.

At any rate, here are the maps:

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

Action Closer to Me

As I live in California, it makes it easier for me if I keep them in the list where I can see what’s shaking near me.

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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7 Responses to Quakes Catch Up

  1. E.M.Smith says:

    @Adolfo:

    I’d not seen that. VERY interesting…

  2. adolfogiurfa says:

    M 6.9, near the coast of central Peru
    Date: Friday, October 28, 2011 18:54:35 UTC
    Friday, October 28, 2011 01:54:35 PM at epicenter
    Depth: 34.90 km (21.69 mi)
    I was about 195 miles north and I just felt a slow waving and a sudden descent of air temperature (for a few minutes). See what Michele Casati has found:
    http://daltonsminima.altervista.org/?page_id=9506&cpage=302#comment-67277

  3. E.M.Smith says:

    @Adolfo: I hope all of ‘you and yours’ are well and that it was far from anyone…

    @All:

    Well, it does look kind of like that third part of the pattern…

    Magnitude 6.9 – NEAR THE COAST OF CENTRAL PERU
    2011 October 28 18:54:33 UTC

    Earthquake Details

    This event has been reviewed by a seismologist.

    Magnitude 6.9
    Date-Time

    Friday, October 28, 2011 at 18:54:33 UTC
    Friday, October 28, 2011 at 01:54:33 PM at epicenter
    Time of Earthquake in other Time Zones

    Location 14.515°S, 76.009°W
    Depth 23.9 km (14.9 miles)
    Region NEAR THE COAST OF CENTRAL PERU
    Distances 51 km (31 miles) SSW of Ica, Peru
    112 km (69 miles) S of Chincha Alta, Peru
    201 km (124 miles) W of Puquio, Peru
    288 km (178 miles) SSE of LIMA, Peru
    Location Uncertainty horizontal +/- 16.5 km (10.3 miles); depth +/- 2.7 km (1.7 miles)
    Parameters NST=507, Nph=517, Dmin=293.9 km, Rmss=1.12 sec, Gp= 50°,
    M-type=regional moment magnitude (Mw), Version=8
    Source

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

    Event ID usb0006fv2

  4. E.M.Smith says:

    Well this isn’t good either. At present, the Iceland page has 2 quakes larger than magnitude 3 on top of the Katla volcano:

    http://en.vedur.is/earthquakes-and-volcanism/earthquakes/myrdalsjokull/

  5. E.M.Smith says:

    In addition to a 4.x in the mountains down near Ridgecrest California (in keeping with the ‘quakes moving inland’ idea) we’ve had a bigger one down near Southern Mexico in the Pacific. As ‘things move north’ sometimes, I’ll be watching for any sequencing of larger actions along that fault / ridge working it’s way toward So.Cal and eventually me…

    Magnitude 6.3 – REVILLA GIGEDO ISLANDS REGION
    2011 November 01 12:32:00 UTC

    Earthquake Details

    This event has been reviewed by a seismologist.

    Magnitude 6.3
    Date-Time

    Tuesday, November 01, 2011 at 12:32:00 UTC
    Tuesday, November 01, 2011 at 05:32:00 AM at epicenter
    Time of Earthquake in other Time Zones

    Location 19.891°N, 109.216°W
    Depth 5 km (3.1 miles)
    Region REVILLA GIGEDO ISLANDS REGION
    Distances 227 km (141 miles) NE of Socorro Island, Mexico
    333 km (206 miles) SSE of Cabo San Lucas, Baja Calif. Sur, Mexico
    419 km (260 miles) W of Puerto Vallarta, Jalisco, Mexico
    1050 km (652 miles) W of MEXICO CITY, D.F., Mexico
    Location Uncertainty horizontal +/- 21 km (13.0 miles); depth +/- 2.8 km (1.7 miles)
    Parameters NST=359, Nph=359, Dmin=427.5 km, Rmss=1.04 sec, Gp=162°,
    M-type=”moment” magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=F
    Source

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

    Event ID usb0006hfg

  6. E.M.Smith says:

    Well, that’s interesting… A 4.7 in the Heartland’ of America. When things are getting close to a 5, well, ‘something is up’…

    Magnitude 4.7 – OKLAHOMA
    2011 November 05 07:12:45 UTC

    Earthquake Details

    This event has been reviewed by a seismologist.

    Magnitude 4.7
    Date-Time

    Saturday, November 05, 2011 at 07:12:45 UTC
    Saturday, November 05, 2011 at 02:12:45 AM at epicenter
    Time of Earthquake in other Time Zones

    Location 35.570°N, 96.703°W
    Depth 4.9 km (3.0 miles)
    Region OKLAHOMA
    Distances 33 km (20 miles) NE of Shawnee, Oklahoma
    67 km (41 miles) W of Okmulgee, Oklahoma
    68 km (42 miles) SSE of Stillwater, Oklahoma
    75 km (46 miles) E of OKLAHOMA CITY, Oklahoma
    Location Uncertainty horizontal +/- 12.9 km (8.0 miles); depth +/- 3 km (1.9 miles)
    Parameters NST=240, Nph=246, Dmin=90.2 km, Rmss=1.31 sec, Gp= 18°,
    M-type=body wave magnitude (Mb), Version=9
    Source

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

    Event ID usb0006k8b

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