Showing posts with label New York. Show all posts
Showing posts with label New York. Show all posts

Thursday, December 2, 2010

Measuring Earthquakes in Western New York

From the web pages of the Lamont-Doherty Earth Observatory:

Each year, dozens of small, mostly harmless earthquakes quakes rattle the northeastern United States and southern Canada, and one quite active area runs along the shores of lakes Erie and Ontario, in western New York. In order to learn more about what generates these, and the possible threat of something bigger, scientists at Columbia University’s Lamont-Doherty Earth Observatory have installed a new seismometer at the West Valley Central School, southeast of Buffalo.  Officially announced on Oct. 15, it is the latest addition to the Lamont Cooperative Seismic Network, which monitors earthquakes throughout the region. The station not only sends data to the scientific community, but gives hands-on experience to West Valley students, who have been given computer hardware and software t0 analyze  signals from the instrument.

Funded with a $25,000 grant from the New York State Energy Research and Development Authority, the station was installed by Lamont seismologist Won-Young Kim, head of the network. There are now 28 stations including this one, from New York’s Central Park to near the Canadian border. Many are run in cooperation with schools, universities, museums and other organizations. Signals are sent in real time to Lamont, and disseminated to scientists worldwide via the internet.

Monday, February 15, 2010

Small earthquakes near Albany

Just like a year ago, there has been a series of small earthquakes in the Albany, NY, area.

Here is the list of 8 events as of now, from the LCSN:

DATE
------
TIME
------
LAT
------
LON
------
DEPTH
------
MAG
------
Comments
----------
10/02/1509:08:04.142.584N74.156W20.01.70Mc34 km W of Albany, NY
10/02/1508:46:25.742.589N74.157W20.02.20Mc34 km W of Albany, NY
10/02/1411:36:58.942.584N74.139W19.01.90Mc32 km W of Albany, NY
10/02/1410:41:35.342.582N74.134W19.01.60Mc32 km W of Albany, NY
10/02/1405:52:47.742.584N74.133W18.01.50Mc32 km W of Albany, NY
10/02/1405:47:19.042.584N74.123W17.01.30Mc31 km W of Albany, NY
10/02/1403:23:32.842.582N74.158W22.01.70Mc34 km W of Albany, NY
10/02/1402:51:20.342.580N74.137W18.01.70Mc32 km W of Albany, NY

Here is a map from LCSN:
Notice the Albany quakes in the center of the map.

Thursday, May 21, 2009

An earlier Niagara earthquake

Photo from NY State

Coincidentally, the week of the Buffalo quake mentioned in the last blog, the Niagara Falls Reporter recalls an earlier quake in the region.

And, on Saturday, I'll be driving through Niagara Falls on my way to the AGU in Toronto.

EARTHQUAKE ACTIVITY RARE BUT MEMORABLE IN NIAGARA
By Bob Kostoff

This area seems to have lucked out by never experiencing a major earthquake, at least within recorded history. But we have had a few minor tremors from time to time because we do exist in a fault area.

Mostly the tremors just caused some frayed nerves and perhaps a few broken dishes that were rattled off shelves and tables. A couple of incidents were reported in the spring of 1897.

The local newspaper reported in a headline on March 6, 1897, "And the earth trembled."

The report went on to say that area residents were startled at about 10:40 p.m. on March 5 by the rumbles, which were told in a number of headlines as "This city was included in a belt that was shaken severely by a well defined earthquake at 10:40 o'clock last night" and "Windows and dishes broken."

People were rattled and shaken "for miles about between here and Lake Ontario" and it was felt worst below "the mountain ridge. On the Indian Reservation, the Indians were all alarmed." Not to be outdone, "Lewiston and Youngstown residents were frightened," and the trembles caused equal concern in areas of Canada.

At first, the populace was perplexed. The newspaper said, "What was it? A question on everybody's lips this morning. It came over telegraph and telephone wires and down the streets. It fairly howled its way along, but no answer came."

Of course, seismic information was not as sophisticated in those days.

At first, the report said, "the general opinion was that some terrible explosion has occurred."

It must have been a pretty powerful tremor, because "it was so severe that police at the No. 2 Police Station thought a bank had been robbed near them and they investigated, but investigated in vain."

The newspaper office even then was the place to go for information, so reporters fielded a myriad of phone calls from Lewiston, Youngstown, and even from Thorold and St. Catharines in Ontario. The inquiries "were about some explosion that occurred here."

The paper noted, "There are several powder magazines in the vicinity of this city and these were examined and found to be all right. The mystery deepened."

An exhaustive search was made for some building blown to smithereens, but nothing was found.

The newspaper reported, "The shock was so sharp, sudden and short that no one thought of an earthquake."

When no other explanation could be found, citizens began believing an earthquake had occurred here.

A short time later, on May 28, 1897, the newspaper reported in a series of headlines, "Visit of an earthquake. This city included in a broad belt of country that was shaken last night. Many startled in Buffalo. The quake felt eastward into Vermont and north to Montreal. The shock here was rather light but a number noticed it. No damage done." This time, the report said, "thousands of people recognized it at once" as an earthquake. "The quake was distinguishable here in Niagara Falls, though the shock was slight."

Residents of Lockport felt the shock more distinctly. The tremor "rattled windows and blinds."

But in Niagara Falls, such noise was becoming commonplace. The newspaper reported that the quake "was very similar to the effect of heavy blasts in the Tunnel District, which are so frequent that no attention is paid to them."

The tunnel referred to is the one dug from the upper river under the city to the gorge so falling water could turn turbines and generate electrical power.




Wednesday, May 20, 2009

Small earthquakes in Albany, NY


Back to the East Coast. From LCSN:

Recent Earthquakes in the Northeastern U.S.

== PRELIMINARY EARTHQUAKE REPORT ==
A minor earthquake occurred at 8:53:29 PM (EDT) on Sunday, May 17, 2009 .
The magnitude 3.0 event occurred 32 km (20 miles) SW of Albany,NY.
The hypocentral depth is 9 km ( 6 miles).


Magnitude 3.0 - duration magnitude (Md)
Time Sunday, May 17, 2009 at 8:53:29 PM (EDT)
Monday, May 18, 2009 at 0:53:29 (UTC)
Distance from Albany,NY - 32 km (20 miles) SW (232 degrees)
Schenectady,NY - 34 km (21 miles) SSW (206 degrees)
Pittsfield,MA - 84 km (52 miles) WNW (295 degrees)
Coordinates 42 deg. 34.3 min. N (42.571N), 74 deg. 6.7 min. W ( 74.112W)
Depth 9 km (5.6 miles)
Quality Fair
Location Quality Parameters Nst= 24, Nph= 49, Dmin=27.3 km, Rmss=0.21 sec, Erho=0.2 km, Erzz=0.5 km, Gp=72 degrees
Event ID# ld1023914

Saturday, February 28, 2009

NYGS at NYSM



I tried to track down some more information on the New York Geological Survey.

It seems like there could be a better state presence to represent the interests of the citizens of New York concerning geologic hazards and resources. Perhaps this is being handled ok as is, or perhaps the existence of federal agencies like the USGS and entities like LCSN fill the gap.



There has been an historical association of the NYGS within the State Museum:
Our history of inquiry, discovery, and education began in 1836 when we were established as the State Geological and Natural History Survey. Over the years, we have grown into a major research and an educational institution dedicated to preserving New York's rich artistic, social, historical, and environmental legacies under the leadership of the New York State Education Department.
But, there also seems to have decreases in state funding in support of geology:

The Times Union (Albany, NY)
December 9, 1997
Quake-spotters feel tremors of apathy
BYLINE: BRUCE A. SCRUTON; Staff Writer
Late on the afternoon of June 8, 1996, about 9.6 miles under the village of Altamont, the earth moved.
Only one person noticed.
''It should have been felt,'' said Walter Mitronovas, who discovered the earthquake when it registered 2.5 on one of two seismographs at the State Museum. ''But there was a thunderstorm at the same time. That probably explains it.''
As the state's seismologist, Mitronovas has spent nearly 20 years measuring the Earth when it moves. But when he retires next spring, the $ 61,500 position won't be filled.
Dr. Robert Fakundiny, a geologist who oversees the state Geological Survey, said a hiring freeze, lack of funding sources and a dwindling interest in Northeast earthquakes is to blame.
''Most people are now convinced the earthquake hazard is not high enough (in the Northeast) to warrant the continued funding,'' said Fakundiny.
''The last five years have been very quiet,'' said Mitronovas, 61. ''I'm not sure it's the quiet before the storm, though.''
Although the number and size of earthquakes in the Northeast is about 50 times lower than in California, Mitronovas said a quake here will have a wider damage pattern because of the type of soils in the Northeast and the under-ground rock patterns that would carry the shock waves further.
The state's seismology position was created in the early 1970s when Bethlehem Steel wanted to dispose of toxic waste in a deep well in western New York. Because a similar operation in Colorado showed the possibility of manmade earthquakes, a system of seismographs was installed by the state Geological Survey and Lamont-Doherty, now known as the Earth Observatory of Columbia University. That system picked up other earthquakes in the Wyoming County town of Dale, about 100 miles away from the toxic disposal site and caused by a deep well salt-mining operation.
''When that (salt) operation was shut down, the earthquakes stopped,'' said Fakundiny. Curious, the scientists decided to experiment by triggering their own earthquakes at the site. When Columbia, fearing it could be liable for potential damages caused by these earthquakes, withdrew from the project, the state decided to hire its own seismologist.
The first seismologist left in the late 1970s as that series of experiments wound down. However, the state was immersed in contentious hearings on siting nuclear power plants,and wanted its own expert to gauge the potential of earthquake damage to reactors.
Mitronovas was in Switzerland and wanted to return to the United States. He arrived in February 1978 to set up and monitor the state's seismic network. At one point in the early 1980s, there were networks operated by the state, Lamont, the U.S. Geological Survey and a consortium of power companies reaching about 50 machines scattered around the state.

Thursday, February 26, 2009

Where is the New York Geological Survey?

As I have been looking for information on the recent small earthquakes that have occurred in Pennsylvania, then New Jersey, most recently New York, I eventually want to check out what the state geological surveys have to say about earthquakes in general, and also about particular events.

There is a nice web page for the Association of American State Geologists (AASG), which "represents the State Geologists of the 50 United States and Puerto Rico. Founded in 1908, AASG seeks to advance the science and practical application of geology and related earth sciences in the United States and its territories, commonwealths, and possessions."

However, when you click on the state of New York, you are directed to the New York State Museum, and then to information about pretty minerals. Now, I love museums, but this hardly seems appropriate as a source for geological information about hazards and resources within a state.

There is an "unofficial gateway" to the resources of the New York Geological Survey, which states "The NYSGS does not have an official web site at this time."

By putting 2+2+2 together, I was able with some effort to track down a web presence for the Office of the State Geologist. Yet all one finds is a list of names. Compare this to the other state surveys on the AASG website above. New York's web presence hardly seems acceptable in this day and age.

What's up, New York?

Monday, February 23, 2009

What's shaking in Albany, NY?


Well, while I've been worrying about small earthquakes in Pennsylvania and New Jersey, you might have thought I'd forgotten about New York. Lo and behold, there have been seven small earthquakes near Albany in the last week. Belated fallout from the Eliot Spitzer affair? Who knows.

A list of the events from the LCSN web page is below. Each event is hot-linked to a more detailed report.
 MAG    DATE    LOCAL-TIME  LAT    LON   DEPTH  LOCATION
y/m/d h:m:s deg deg km from Albany
2.1  2009/02/23 10:46:20 42.574N 74.094W  7.0   19 mi SW
2.1 2009/02/21 02:30:43 42.569N 74.103W 11.0 20 mi SW
2.7 2009/02/20 13:04:19 42.572N 74.096W 8.0 19 mi SW
1.6 2009/02/19 09:22:58 42.573N 74.094W 8.0 19 mi SW
2.4 2009/02/18 11:20:23 42.572N 74.101W 10.0 20 mi SW
2.7 2009/02/17 22:41:50 42.570N 74.103W 9.0 20 mi SW
2.1 2009/02/17 09:33:26 42.571N 74.135W 16.0 21 mi SW

Here is part of a news account of one of these:
Earthquake triggers Gilboa dam inspection
Saturday, February 21, 2009

— A small earthquake southeast of Albany Wednesday prompted an immediate inspection of the Gilboa Dam under new operating procedures put in place by the New York City Department of Environmental Protection, an engineer said Friday.

The earthquake was minor and didn’t cause any damage to the massive concrete structure that remains the focus of a multimillion-dollar construction project now in its first phase, said John H. Vickers, chief of western operations for the DEP.

According to the Lamont-Doherty Cooperative Seismographic Network, the magnitude 2.4 event took place at roughly 11:20 p.m. on Wednesday, centered roughly 32 miles southeast of Albany.

People in the vicinity of a magnitude 2.4 earthquake would feel minor shaking lasting two or three seconds, according to Won-Young Kim, senior research scientist at the Lamont-Doherty Earth Observatory of Columbia University in Palisades, NY.

The New York City DEP was notified and immediately dispatched inspectors to ensure there were no problems, as part of new standard operating procedure, Vickers said.

But I haven't seen any stories yet on the whole mini-swarm.