MEASUREMENTS OF EARTH QUAKE Flashcards
IT IS THE STUDY OF EARTHQUAKE.
SEISMOLOGY
IS A SCIENTIST WHO STUDIES EARTHQUAKES
SEISMOLOGIST
ENERGY REALEASED IN AN EARTHQUAKE THAT TRAVELS IN WAVES.
SEISMIC WAVES
THE FIRST KNOWN EARTHQUAKE DETECTOR WAS INVENTED IN 132 A.D.
EARTHQUAKE WEATHERCOCK
CHINESE ASTRONOMER AND MATHEMATICIAN WHO INVENTED “EARTHQUAKE WEATHERCOCK.” (“HOUFENG DIDONG YI”)
CHANG HENG
INSTRUMENT THAT RECORDS THE SHAKING OF THE EARTH’S SURFACE
CAUSED BY SEISMIC WAVES
SEISMOGRAPH
PAPER RECORD OF THE EARTHQUAKE DATA.
SEISMOGRAM
THE SIZE OF AN EARTHQUAKE DEPENDS ON THE SIZE OF THE ___________
FAULT
SHORT WIGGLY LINE THAT DOESN’T WIGGLE
VERY MUCH MEANS A
SMALL EARTHQUAKE
LONG WIGGLY LINE THAT
WIGGLES A LOT MEANS A
LARGE EARTHQUAKE
RELATED TO THE AMOUNT OF SEISMIC ENERGY RELEASED AT THE
HYPOCENTER OF THE EARTHQUAKE
MAGNITUDE
BASED ON THE
OBSERVED EFFECTS OF GROUND SHAKING ON PEOPLE, BUILDINGS, AND NATURAL
FEATURES.
INTENSITY
DIFFERENT TYPE OF SCALES
- RICHTER SCALE
*MODIFIED MERCALLI INTENSITY SCALE
*MOMENT MAGNITUDE SCALE
The Richter magnitude scale was developed
in 1935 BY WHO?
Charles Francis Richter
This scale uses the observations of the people
who experienced the earthquake, and the
amount of damage that occurred, to estimate its
intensity
modified mercalli intensity scale
WHO INVENTED MODIFIED MERCALLI INTENSITY SCALE
Giuseppe Mercalli
WHO MODIFIED the
original scale in 1931 to become what is now
known as the Modern Mercalli Intensity Scale
Harry
Wood and Frank Neumann
RESISTANCE OF ROCK TO BENDING WHEN FORCE IS APPLIED
ROCK RIGIDITY
The shaking of the ground caused by sudden motions along the
faults, or fractures in the earths crust
earthquake
it works over a wider range of
earthquake sizes and is applicable
globally and it
is based on the total moment release
of the earthquake.
moment magnitude scale,
The distribution of intensity at different locations
is shown graphically using________
isoseismals
depth of earthquake causes more intense
shaking at the surface
Shallow earthquakes
depth of earthquake that have seismic waves that
attenuates on their way
to the surface
Deep earthquakes
DEPTH OF EARTHQUAKE
Shallow earthquakes
Deep earthquakes
Three Features of Shaking
perception by people and animals
performance of buildings
changes to natural surroundings
