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yogi3939
October 8th, 2009, 12:38 PM
No matter what you think about global warming or its causes there has been a lot of melting that is fully documented of glaciers and mountain snow pack. It is thought that this loss of snow pack in the mountains around california's major cities will lead to a fresh water crisis. There are other places in the world facing the same crisis.

So what does this have to do with volcanic activity?

I read somewhere recently that there is enough water running off land based ice and snow fields that it has already raised the mean average level of the oceans by several inches. The article went on to state that the tectonic plates under the ocean are thought to be very sensitive to the pressure changes brought on by the increase in water over them.

If this is true then we could be seeing more volcanic activity in the future if the meltoff continues. And if the scientists who think that the solar flare and sunspot activity is responsible for the melting are right; and if they are also right that we are heading toward a record flare and sunspot maximum in the near future, I guess we should make sure our global seatbelts are fastened securely.

im4Jesus
October 8th, 2009, 12:40 PM
We are at a deep solar minimum now. I wonder if that has anything to do with, and if so how? The level of inactivity on the US side is troubling. When that side slips it is going to be horrendous. I think we are starting to see precursors.

What do you mean?

im4Jesus
October 8th, 2009, 12:43 PM
You make a great point with the lack of real activity going on on this side of the pacific and the amount going on on the otherside of the pacific, We all know that earthqaukes happen along fault line and those fault lines are made from pieces of earth crust/mantel.. if one side of the mantel is moving and the other hasn't yet what pressure is being built up... In addtion with the earthquakes happening the way they are that is alot of friction and also movement of magama tubes and magma chambers.. meaning??? what should we expect next? IMO I would say a mojor west coast US earthquake or a huge volcano eruption or both
__________________

Never mind -- I think Pendragon's previous post answered the question.

lighthouse
October 8th, 2009, 01:10 PM
Volcanic Eruptions and Solar Activity
Richard B. Stothers

Institute for Space Studies, NASA Goddard Space Flight Center, New York

The historical record of large volcanic eruptions from 1500 to 1980, as contained in two recent eruption catalogs, is subjected to detailed time series analysis. Two weak, but probably statistically significant, periodicities of ∼11 and ∼80 years are detected. Both cycles appear to correlate with well-known cycles of solar activity; the phasing is such that the frequency of volcanic eruptions increases (decreases) slightly around the times of solar minimum (maximum). The weak quasi-biennial solar cycle is not obviously seen in the eruption data, nor are the two slow lunar tidal cycles of 8.85 and 18.6 years. Time series analysis of the volcanogenic acidities in a deep ice core from Greenland, covering the years 553–1972, reveals several very long periods that range from ∼80 to ∼350 years and are similar to the very slow solar cycles previously detected in auroral and carbon 14 records. Mechanisms to explain the Sun-volcano link probably involve induced changes in the basic state of the atmosphere. Solar flares are believed to cause changes in atmospheric circulation patterns that abruptly alter the Earth's spin. The resulting jolt probably triggers small earthquakes which may temporarily relieve some of the stress in volcanic magma chambers, thereby weakening, postponing, or even aborting imminent large eruptions. In addition, decreased atmospheric precipitation around the years of solar maximum may cause a relative deficit of phreatomagmatic eruptions at those times.




Ammann, Caspar M. (2003), Statistical analysis of tropical explosive volcanism occurrences over the last 6 centuries, Geophys Res Lett, 30, 1210.[CrossRef]

Glazner, Allen F., Curtis R. Manley, J. S. Marron, and Stuart Rojstaczer (1999), Fire or ice: anticorrelation of volcanism and glaciation in California over the past 800,000 years, Geophys Res Lett, 26(12), 1759.[CrossRef]

Stothers, Richard B. (1990), A search for long‐term periodicities in large earthquakes of southern and coastal central California, Geophys Res Lett, 17(11), 1981.[CrossRef]

Stothers, Richard B. (2002), Cloudy and clear stratospheres before A.D. 1000 inferred from written sources, J Geophys Res, 107, 4718.[CrossRef]

Stothers, Richard B. (2007), Three centuries of observation of stratospheric transparency, Clim Change, 83(4), 515.[CrossRef]

jt0830
October 8th, 2009, 03:22 PM
DetailsSummaryMapsScientific & Technical
Earthquake Details
Magnitude 5.2
Date-Time Thursday, October 08, 2009 at 18:10:51 UTC
Friday, October 09, 2009 at 05:10:51 AM at epicenter
Time of Earthquake in other Time Zones

Location 12.031°S, 165.903°E
Depth 38.5 km (23.9 miles)
Region SANTA CRUZ ISLANDS
Distances 145 km (90 miles) S of Lata, Santa Cruz Islands, Solomon Isl.
410 km (255 miles) NNW of Luganville, Espiritu Santo, Vanuatu
710 km (440 miles) ESE of HONIARA, Guadalcanal, Solomon Islands
2175 km (1350 miles) NE of BRISBANE, Queensland, Australia

Location Uncertainty horizontal +/- 10.9 km (6.8 miles); depth +/- 8.1 km (5.0 miles)
Parameters NST= 41, Nph= 41, Dmin=>999 km, Rmss=1.16 sec, Gp= 61°,
M-type=body wave magnitude (Mb), Version=7
Source USGS NEIC (WDCS-D)


Event ID us2009mmcg


This is about 2:10 EST

lighthouse
October 9th, 2009, 05:26 AM
Update time = Fri Oct 9 9:19:26 UTC 2009


MAG UTC DATE-TIME
y/m/d h:m:s LAT
deg LON
deg DEPTH
km Region
MAP 5.1 2009/10/09 07:36:20 -17.937 -115.927 10.0 SOUTHERN EAST PACIFIC RISE
MAP 5.3 2009/10/09 07:33:29 -13.267 166.286 35.0 VANUATU
MAP 4.4 2009/10/09 04:25:05 36.395 -117.874 6.1 CENTRAL CALIFORNIA
MAP 4.9 2009/10/09 03:47:30 -12.906 166.535 35.0 SANTA CRUZ ISLANDS
MAP 4.6 2009/10/09 00:44:49 -23.948 -66.726 203.2 JUJUY, ARGENTINA
MAP 4.7 2009/10/09 00:08:04 -12.884 166.004 35.7 SANTA CRUZ ISLANDS

--------------------------------------------------------------------------------
MAG UTC DATE-TIME
y/m/d h:m:s LAT
deg LON
deg DEPTH
km Region
MAP 5.6 2009/10/08 23:35:51 -12.488 166.501 81.2 SANTA CRUZ ISLANDS
MAP 4.9 2009/10/08 23:32:39 -13.149 165.934 58.6 VANUATU
MAP 4.8 2009/10/08 23:08:36 46.135 -27.512 10.3 NORTHERN MID-ATLANTIC RIDGE
MAP 3.4 2009/10/08 22:55:59 42.293 -106.888 10.0 WYOMING
MAP 5.3 2009/10/08 22:43:33 -10.842 165.409 18.9 SANTA CRUZ ISLANDS
MAP 5.2 2009/10/08 22:32:56 -19.580 -178.007 598.2 FIJI REGION
MAP 5.3 2009/10/08 21:37:21 -12.400 166.100 54.6 SANTA CRUZ ISLANDS
MAP 6.2 2009/10/08 21:16:12 -12.879 166.200 11.3 SANTA CRUZ ISLANDS
MAP 3.3 2009/10/08 20:23:14 59.716 -142.641 14.3 GULF OF ALASKA
MAP 3.2 2009/10/08 20:00:19 19.183 -64.824 12.9 VIRGIN ISLANDS REGION
MAP 5.0 2009/10/08 19:42:46 -16.035 168.203 291.2 VANUATU
MAP 4.9 2009/10/08 18:51:28 -11.660 165.958 35.0 SANTA CRUZ ISLANDS
MAP 5.2 2009/10/08 18:10:51 -12.031 165.903 38.5 SANTA CRUZ ISLANDS
MAP 2.6 2009/10/08 18:04:31 19.213 -155.610 7.2 ISLAND OF HAWAII, HAWAII
MAP 4.9 2009/10/08 17:55:01 -13.013 166.216 35.0 VANUATU
MAP 3.4 2009/10/08 17:47:56 58.965 -154.372 117.2 ALASKA PENINSULA
MAP 3.2 2009/10/08 14:45:15 19.495 -65.989 4.7 PUERTO RICO REGION
MAP 2.8 2009/10/08 14:36:28 36.408 -117.850 2.4 CENTRAL CALIFORNIA
MAP 2.6 2009/10/08 13:40:40 18.171 -67.128 23.7 PUERTO RICO
MAP 2.5 2009/10/08 12:59:35 19.362 -155.409 13.8 ISLAND OF HAWAII, HAWAII
MAP 3.0 2009/10/08 12:46:52 34.992 -116.950 9.1 SOUTHERN CALIFORNIA
http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/quakes_all.php

lighthouse
October 9th, 2009, 05:28 AM
http://www.volcanolive.com/news.html

Thursday 8th October 2009
Vanuatu/Solomon Islands Earthquakes
Listed below is a summary of the large and major earthquakes to hit the Vanuatu/Solomon Islands region today, 8th October 2009. Times are local.
Mag 6.1 8th October 2009 at 07:34 pm. 12.284°S, 166.568°E. Depth 35 km.
Mag 7.0 8th October 2009 at 07:28 pm. 13.298°S, 165.951°E. Depth 35 km.
Mag 6.6 8th October 2009 at 01:12 pm. 11.650°S, 166.170°E. Depth 35 km.
Mag 7.3 8th October 2009 at 10:13 am. 13.145°S, 166.297°E. Depth 33 km.
Mag 7.7 8th October 2009 at 09:18 am. 12.554°S, 166.320°E. Depth 35 km.
Mag 7.8 8th October 2009 at 09:03 am. 13.052°S, 166.187°E. Depth 35 km.
Earthquakes of this size can disrupt nearby volcanoes. Active Vanuatu volcanoes close to the epicentre are Suretamatai, Gaua, Ambae, Ambrym, and Lopevi. Tinakula volcano is located north in the Solomon Islands.
Volcanoes of Vanuatu...

Thursday 8th October 2009
Vanuatu Earthquakes (mag 7.8 mag 7.7, mag 7.3)
Three major earthquakes hit northern Vanuatu this morning. The first earthquake hit at 9:03 am local time 37 km west of the Torres Islands. This was followed at 9:18 am by magnitude 7.7 earthquake, and 10:13 am by magnitude 7.3 earthquake. A small tsunami was generated. Earthquakes of this size can affect nearby volcanoes. Active Vanuatu volcanoes close to the epicentre are Suretamatai, Gaua, Ambae, Ambrym, and Lopevi. Tinakula volcano is located north in the Solomon Islands. Gaua volcano in northern Vanuatu has been showing signs of increasing activity over the past week.

caligal
October 9th, 2009, 10:09 PM
There was a 4.4 this evening near Hoover Dam. Did anyone in thses forums feel it?

lighthouse
October 12th, 2009, 05:28 AM
Update time = Mon Oct 12 9:24:25 UTC 2009


MAG UTC DATE-TIME
y/m/d h:m:s LAT
deg LON
deg DEPTH
km Region
MAP 3.2 2009/10/12 06:44:19 32.077 -115.329 9.8 BAJA CALIFORNIA, MEXICO
MAP 5.0 2009/10/12 06:37:15 -12.997 165.827 128.1 SANTA CRUZ ISLANDS
MAP 2.7 2009/10/12 05:14:06 18.482 -66.303 94.2 PUERTO RICO REGION
MAP 6.0 2009/10/12 03:15:47 -17.200 66.602 10.0 MAURITIUS - REUNION REGION
MAP 3.3 2009/10/12 02:11:10 19.326 -64.822 53.5 VIRGIN ISLANDS REGION
MAP 2.6 2009/10/12 00:40:01 33.889 -118.201 14.0 GREATER LOS ANGELES AREA, CALIFORNIA
MAP 3.1 2009/10/12 00:36:23 19.232 -64.775 6.5 VIRGIN ISLANDS REGION
MAP 3.2 2009/10/12 00:19:37 19.009 -64.622 57.2 VIRGIN ISLANDS REGION
MAP 2.9 2009/10/12 00:19:37 19.262 -64.904 5.8 VIRGIN ISLANDS REGION
MAP 3.1 2009/10/12 00:07:35 19.208 -64.691 5.6 VIRGIN ISLANDS REGION
MAP 3.1 2009/10/12 00:00:40 19.401 -65.746 13.9 PUERTO RICO REGION

Mishkins
October 12th, 2009, 05:29 AM
Is this normal - for there to keep being smaller quakes in this region? Mishk.