weston observatory in the 21 st century... seismology research science education public outreach...
TRANSCRIPT
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Weston Observatoryin the 21st Century...
SeismologyResearch
Science Education
PublicOutreach
• Earthquakes• Monitoring Planet Earth• Earth’s Interior• Earth Processes
Science Educationand Public Outreach Through Seismology
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Virginia EarthquakeRecorded at Weston Observatory
August 23, 2011
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Magnitude 5.8 VIRGINIATuesday, August 23, 2011 at 17:51:04 UTC
There were no reported deaths, and scattered reports of minor injuries.
Air and train traffic was disrupted across the Northeast and mid-Atlantic.
Two nuclear plants in Virginia were immediately taken offline after the earthquake.
An earthquake in central Virginia was felt across much of the East Coast on Tuesday, causing light damage and forcing hundreds of thousands of people to evacuate buildings in New York, Washington and other cities.
Image courtesy of the US Geological Survey
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VirginiaMagnitude 5.8
August 23, 2011
CaliforniaMagnitude 6.0
September 28, 2004
Adapted from Horton (2012)
(Data from U.S. Geological Survey, “Did you feel it?” website)
Where people reported feeling the effects of the Virginia earthquake (green) compared
with where a magnitude 6 earthquake in California was reported as being felt (blue).
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But, then there are these “troublesome” (not always so little) earthquakes in the middle of the plates...
“Intraplate” Earthquakes
Plate TectonicsExplains MostEarthquakes
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Boston College Educational Seismology Project:
Science Education Through Seismology
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Hollis Center, MaineMagnitude 4.0
October 16, 2012
Boston College Educational Seismology Project
Weston ObservatoryGleason Public Library
Carlisle, MA
16 sec
16 sec
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IPL
IPLGPL
BCDALK
Hollis Center, MaineMagnitude 4.0
October 16, 2012
Ipswich Public Library (IPL)
Gleason Public Library (GPL)
Boston College (BCD)
Alan’s Basement (ALK)
20 sec
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Hollis Center, Maine: Magnitude 4.0, October 16, 2012
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Magnitude 9.0Near East Coast of Honshu, Japan
Magnitude 6.5 – Bali Sea
Magnitude 6.5 - Japan Aftershock
Recorded at Weston Observatory
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Magnitude 9.0 NEAR THE EAST COAST OF HONSHU, JAPANFriday, March 11, 2011 at 05:46:23 UTC
Japan was struck by a magnitude 9.0 earthquake off its northeastern coast on March 11, 2011: Largest earthquake ever recorded in Japan and the 4th largest earthquake ever recorded in the world.
. USGS
Part of houses swallowed by
tsunami burn in Sendai, Miyagi
Prefecture (state) after Japan was
struck by a strong earthquake off its
northeastern coast Friday, March 11,
2011.
New York Times
In downtown Tokyo, large buildings shook violently and there was severe flooding due to a tsunami generated by the earthquake.
Japan's worst previous quake was in 1923
in Kanto, a magnitude 8.3 quake that killed
143,000 people.
~16,000 fatalities
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DateThe black squiggly lines represent ground motion.
Each line is one hour.
Seismic waves from magnitude 7.1 earthquake - Vanuatu (South Pacific).
TIME - MILITARY TIME IN GREENWICH, ENGLAND – GREENWICH MEAN TIME (GMT)OUR CLOCK IS BEHIND 5 HOURS IN WINTER (EST) AND IS BEHIND 4 HOURS IN SUMMER (DST).
minutes
Background noise caused by offshore waves, people walking by, ventilator fans, etc……. not earthquake waves.
The present hour is the last line on the screen.Present time
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Costa RicaMagnitude 7.6
September 5, 2012
Boston College Educational Seismology Project
Devlin Hall, Boston College Gleason Public LibraryCarlisle, MA
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Hurricane Sandy Recorded by Seismograph at Devlin Hall, Boston College
October 28 October 29 October 30
October 31 November 1
Sandy enters Boston area
Sandy leaves Boston area
Queen Charlotte Islands Earthquake, Magnitude 7.7
Magnitude 6.3Aftershock
Hurricane Sandyin Boston Area
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A fault about the size of New England moved about 40 ft during about 2 min.
03/11/11-04/14/11, M≥6 (Aftershocks)
+ 1973-1999, M≥5 (Background Seismicity)03/11/11, M=9.0 (Main Shock)
Fault Plane
Fault Plane of Japan Earthquake Plotted on Map of New England
Japan Mega-Quake
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A fault about the size of Boston moved about 1 ft during a few seconds.
August 23, 2011 - Magnitude 5.8 Earthquake in Virginia
Gleason Public LibraryCarlisle, MA
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Magnitude 7.0 Earthquake in Haiti - January 12, 2010
Photos from: CNN.com and MSN.com
~316,000 fatalities
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Magnitude 7.0 Earthquake in HaitiRecorded at Weston Observatory
January 12, 2010