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Originally posted by Robin Marks
The following is an amazing piece of film. It is footage taken just days before the San Francisco Earthquake in 1906.
What you may notice is the puddles in the street. It had rained just previous to the filming. In fact, there was heavy rains in the period just before the earthquake.
Did the rains contribute to the earthquake?
One thing is for sure, the earthquake cause liquefaction. The liquefaction led to much of the damage.
But that's not all. From Wikipedia.
"Widely interpreted previously as precursory activity to the 1906 earthquake, they have been found to have a strong seasonal pattern and have been postulated to be due to large seasonal sediment loads in coastal bays that overlie faults as a result of the erosion caused by "hydraulic mining" in the later years of the California Gold Rush."
So, does sediment loading apply stress to faults. It would seem so. The flooding in the Mississippi is changing the stress loads. Like I said, erosion will lessen the loads in some areas, and sediment deposits will increase loads in other areas.
Interesting note, there's been a return to more normal levels of activity around the New Madrid. Two new ones give me pause. One near Quitman, Ark., and the other near Marianna. Marianna is where they found a new faultline.
edit on 11-7-2011 by Robin Marks because: (no reason given)
EARTHQUAKES AT CARACAS. CONNECTION OF THOSE PHENOMENA WITH THE VOLCANIC ERUPTIONS OF THE WEST INDIA ISLANDS.
"I have recorded in this work all I have been able to collect, and on the accuracy of which I can rely, respecting the earthquake of the 26th of March, 1812. By that catastrophe the town of Caracas was destroyed, and more than twenty thousand persons perished throughout the extent of the province of Venezuela."
However, in the year 1811, fatal experience destroyed the illusion of theory and of popular opinion. Caracas, situated in the mountains, three degrees west of Cumana, and five degrees west of the volcanoes of the Caribbee islands, has suffered greater shocks than were ever experienced on the coast of Paria or New Andalusia.
"At my arrival in Terra Firma, I was struck with the connection between the destruction of Cumana on the 14th of December, 1797, and the eruption of the volcanoes in the smaller West India Islands. This connection was ag 24524u208y ain manifest in the destruction of Caracas on the 26th of March, 1812. The volcano of Guadaloupe seemed in 1797 to have exercised a reaction on the coasts of Cumana. Fifteen years later, it was a volcano situated nearer the continent (that of St. Vincent), which appeared to have extended its influence as far as Caracas and the banks of Apure. Possibly, at both those periods, the centre of the explosion was, at an immense depth, equally distant from the regions towards which the motion was propagated at the surface of the globe."
"From the beginning of 1811 to 1813, a vast superficies of the earth,* (* Between latitudes 5 and 36 degrees north, and 31 and 91 degrees west longitude from Paris.) bound by the meridian of the Azores, the valley of the Ohio, the Cordilleras of New Grenada, the coasts of Venezuela, and the volcanoes of the smaller West India
Islands, was shaken throughout its whole extent, by commotions which may be attributed to subterranean fires. The following series of phenomena seems to indicate communications at enormous distances. On the 30th of January, 1811, a submarine volcano broke out near the island of St. Michael, one of the Azores. At a place here the sea was sixty fathoms deep, a rock made its appearance above the surface of the waters. The heaving-up of the softened crust of the globe appears to have preceded the eruption of flame at the crater, as had already been observed at the volcanoes of Jorullo in Mexico, and on the appearance of the little island of Kameni, near Santorino. The new islet of the Azores was at first a mere shoal; but on the 15th of June, an eruption, which lasted six days, enlarged its extent, and carried it progressively to the height of fifty toises above the surface of the sea. This new land, of which captain Tillard took possession in the name of the British government, giving it the name of Sabrina Island, was nine hundred toises in diameter. It has again, it seems, been swallowed up by
the ocean. This is the third time that submarine volcanoes have presented this extraordinary spectacle near the island of St.Michael; and, as if the eruptions of these volcanoes were subject to periodical recurrence, owing to a certain accumulation of elastic fluids, the island raised up has appeared at intervals of ninety-one or ninety-two years.* (* Malte-Brun, Geographie Universelle. There is, however, some doubt respecting the eruption
of 1628, to which some accounts assign the date of 1638. The rising always happened near the island of St. Michael, though not identically on the same spot. It is remarkable that the small island of 1720 reached the same elevation as the island of Sabrina in 1811.)"
"At the time of the appearance of the new island of Sabrina, the smaller West India Islands, situated eight hundred leagues south-west of the Azores, experienced frequent earthquakes. More than two hundred shocks were felt from the month of May 1811, to April 1812, at St. Vincent; one of the three islands in which there are still active volcanoes. The commotion was not circumscribed to the insular portion of eastern America; and from the 16th of December, 1811, till the year 1813, the earth was almost incessantly agitated in the valleys of the Mississippi, the Arkansas river, and the Ohio. The oscillations were more feeble on the east of the Alleghanies, than to the west of these mountains, in Tennessee and Kentucky. They were accompanied by a great
subterranean noise, proceeding from the south-west. In some places between New Madrid and Little Prairie, as at the Saline, north of Cincinnati, in latitude 37 degrees 45 minutes, shocks were felt every day, nay almost every hour, during several months. The whole of these phenomena continued from the 16th of December 1811, till the year 1813. The commotion, confined at first to the south, in the valley of the lower Mississippi, appeared to advance slowly northward. Precisely at the period when this long series of earthquakes commenced in the Transalleghanian States (in the month of December 1811), the town of Caracas felt the first shock in calm and serene weather. This coincidence of phenomena was probably not accidental; for it must be borne in mind that, notwithstanding the distance which separates these countries, the low grounds of Louisiana and the coasts of Venezuela and Cumana belong to the same basin, that of the Gulf of Mexico."
Originally posted by kimsie
reply to post by sdebunker
Research also shows the largest quakes on the New Madrid fault occur in the winter.
During the winter the rivers are not flooded and the water levels are much lower than in the spring.
Flooding typically occurs in the spring... The 1811 - 1812 quake occured in the winter and the river levels are also lower in the fall months ie: October.
There was a mag 5 in April 2008 but the rivers were not flooded at that time.
Great research but no one can predict a major earthquake, other than God or maybe the guys injecting massive amounts of frack water into the ground or the group with their fingers on the harp trigger.
ORTEGREN, JASON T., Ph.D. Tree-Ring Based Reconstruction of Multi-Year Summer
Droughts in Piedmont and Coastal Plain Climate Divisions of the Southeastern U.S.,
[2.0] Sustained Droughts, 1690-2006
During the period of study, the Piedmont of North Carolina, South Carolina, and
Georgia experienced eleven episodes of sustained (> 4 yr) summer drought. The longest
and most severe drought in the region during the last 300 years occurred during the
period 1811-1820 (Fig. 10). The beginning of the study period, 1690-1712, was a time of
persistent drought with at least three wet summers embedded. The early period may have
consisted of two or more distinct multi-year summer droughts, although the five-year
moving average indicates below-average summer soil moisture conditions in 20 of the 23
years (Fig. 10).