Open Questions: Earthquakes and Seismology
See also: Plate tectonics
- Categorized site directory. Entries usually include
Sites with general resources
USGS Earthquake Hazards Progam: Learning and Education
- Provides educational information on earthquakes, including
short articles on many topics, and
- Commercial organization that is attempting to provide
earthquake forecasting using ground-based sensors and low-orbiting
satellites. Sensors detect extremely low frequency (ELF) magnetic
field fluctuations. Site includes some
Nevada Seismological Laboratory
- An earthquake research facility. The site includes general
information on earthquakes, lists of frequently-asked questions,
- Contains general information and references on earthquakes,
including lists of frequently-asked questions and overviews of
various earthquake topics. From the
Nevada Seismological Laboratory.
Surveys, overviews, tutorials
Why earthquakes are hard to predict
- March 2011 Q&A on the current state of ability to predict
Predicting earthquakes: are we there yet?
- April 2009 Q&A with earthquake expert Malcolm Jonston.
Breaking new ground
- January 2009 article from
"The ability to predict earthquakes could save thousands of
lives every year. But for most scientists, knowing in advance
when and where such events will happen is little more than a
pipe dream. Jon Cartwright tells the story of one physicist
who believes that such warnings could soon be possible."
Maxwell's equations and earthquakes
- Summary of February 2004 article from
"Predicting earthquakes is one of the biggest challenges in
modern earth science. Intermediate and long-term predictions
on timescales of between 1 and 100 years are generally based
on past records of seismic activity. Short-term earthquake
prediction, on the other hand, is more deterministic and
relies on the detection of precursory phenomena."
Neutron flashes may forecast earthquakes
- February 2001 news article from
about a report that earthquakes may be preceded by bursts of
neutrons from the Earth's surface.
Bad vibrations from acoustic lenses
- September 2000 news article from
Physics Web about
research that suggests acoustic lenses focused vibrations from
the 1994 Northridge earthquake to cause especially intense
effects in certain locations.
Why earthquakes stop
- June 1998 news article from
Physics Web about
a model that is able to predict limits to the spreading of
Earthquakes within continents
- Brief page describing research on earthquake activity in the
central U. S. The studies indicate such earthquakes are
"episodic, migrating, and clustered." More specifically,
"Earthquakes occur for a while on a fault system, which then
shuts down for some time while other fault systems becomes active."
Kristina Bartlett Brody
Science News, August 29, 2009
- Despite past failures, geophysicists think earthquake
prediction might yet be possible.
Science News, Aubust 27, 2005
- Lessons from the temblor that produced tsunamis and other
- Solving the Paradox of Deep Earthquakes
Harry W. Green II
Scientific American, September 1994, pp. 64-71
- 30% of all earthquakes occur at a depth of more than 70 km., and
8% occur at depths of more than 300 km. It has been a mystery how
this is possible, given the way rock is expected to flow under
high pressure. Now there is a theory to explain such intermediate-focus
and deep-focus earthquakes, which occur around subduction zones in
Copyright © 2002 by Charles Daney, All Rights Reserved