Natural Service functions of earthquakes
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Transcript of Natural Service functions of earthquakes
Natural Service functions of earthquakes
E.g., zinc, gold, silver, and other mineral resources are deposited
along faults by groundwater tectonic processes are responsible for
most
of the worlds mountain chains unfortunately, none of these methods
can be consistently successful
several PRECURSORS have been used to attempt earthquake prediction
include: unfortunately, none of these methods can be consistently
successful was predicted based a series of M 4.0 foreshocks;
thousands of
In China in 1975, a M 7.0 quake was predicted based a series of M
4.0 foreshocks; thousands of lives were saved The Chinese gov. did
not release detail about the quake and its damage until 5 years
afterwards.It struck in an area not along a plate boundary. The
idea of a seismic gap relates to the concept of the earthquake
cycle Historical and geologic evidence can be used
to reconstruct earthquake history in an area Year of Time quake
interval (yr) 1550 avg. interval = 122 yr probability = 1 in 122 or
0.8 % Map showing percent (%) chance that a M 6.0 or higher quake
will occur along the San Andreas fault in California in the next 30
years seismic gap or locked section of San Andreas
fault in southern California, northeast of Los Angeles:
Inter-mountain west zone New Madrid zone Cascades zone Charleston
zone San Andreas zone East Tennessee zone earthquake warning
systemsdesigned to detect
an earthquake as it occurs and relay warning to nearby cities via
satellite probable warning time: to 1.0 min Earthquakesanticipatory
mitigation strategies
schools hospitals power plants communications systems police and
fire departments after large earthquakes, emergency officials
often experience delays in trying to reach quake victims because of
damage to: These building designs are often required by
state of local governments. In developing countries, a major killer
during
earthquakes are building constructed of earthquake drills in
schools
earthquake disaster exercises educational literature, workshops,
training a home inspection is required before issuing an
earthquake policy normally, you cannot purchase a new earthquake
policy immediately after a major earthquake due to the threat of
aftershocks Personal Emergency Preparedness for Earthquakes:
What can you do before an earthquake to prepare for it? What should
you do if you are in an earthquake?
stay inside drop, cover, and hold on get under a heavy table or
desk, stay away from windows dont use candles until gas lines have
been checked stay away from buildings and power lines stop the
vehicle away from buildings and power lines stay in the vehicle DUE
DATE FRI OCT 5 Extra credit assignment:
prepare a personal 72-hour emergency kit Your kit might include:
food, water, flashlight, portable radio, first aid kit, etc. DUE
DATE FRI OCT 5 Store your kit: in a bag or backpack keep it where
you can quickly grab it and leave FEMA website: