energy releases on/in the earth three general types 1. isotropic (i) -meteorite impacts
DESCRIPTION
ENERGY RELEASES ON/IN THE EARTH THREE GENERAL TYPES 1. ISOTROPIC (I) -METEORITE IMPACTS -CHEMICAL EXPLOSIONS -NUCLEAR EXPLOSIONS -PHASE CHANGES 2. DOUBLE COUPLE (DC) -EARTHQUAKES 3. COMPENSATED LINEAR VECTOR DIPOLE (CLVD) -MAGMA INJECTION. ENERGY RELEASES ON/IN THE EARTH - PowerPoint PPT PresentationTRANSCRIPT
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CENTRAL THEME:
WE CAN TELL HOW THE ENERGYWAS RELEASED FROM ANY
SOURCE BY LOOKING AT THEPATTERN OF WAVES RECORDED AT
DIFFERENT SEISMIC STATIONSAROUND THE WORLD:
FAULT PLANE SOLUTIONSCENTROID MOMENT TENSORS
(CMT’S)
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ENERGY RELEASES ON/IN THE EARTHTHREE GENERAL TYPES
1. ISOTROPIC (I)-METEORITE IMPACTS-CHEMICAL EXPLOSIONS-NUCLEAR EXPLOSIONS-PHASE CHANGES
2. DOUBLE COUPLE (DC)-EARTHQUAKES
3. COMPENSATED LINEAR VECTORDIPOLE (CLVD)-MAGMA INJECTION
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TYPES OF WAVES RADIATED FROM DCSOURCES
1. BODY WAVES- P WAVES- S WAVES
2. SURFACE WAVES- LOVE WAVES- RAYLEIGH WAVES
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WE WILL ONLY CONSIDER PWAVE RADIATION PATTERNS:
BEACH BALLS
P WAVES ARE LONGITUDINALMECHANICAL WAVES: THEYEITHER SQUEEZE (PUSH) ORSTRETCH (PULL) THE EARTH
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ENERGY RELEASES ON/IN THE EARTHTHREE GENERAL TYPES
1. ISOTROPIC (I)-METEORITE IMPACTS-CHEMICAL EXPLOSIONS-NUCLEAR EXPLOSIONS-PHASE CHANGES
2. DOUBLE COUPLE (DC)-EARTHQUAKES
3. COMPENSATED LINEAR VECTORDIPOLE (CLVD)-MAGMA INJECTION
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P & S WAVES RADIATE OUT INA QUADRANTIAL PATTERN
FROM THE FOCUS OF ANEARTHQUAKE
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WE THEN PLOT THEDISTRIBUTION OF
COMPRESSIONS ANDDILATATIONS ON A
STEREONET
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