Prediction of My Pinatubo
- Created by: cconnor09
- Created on: 05-04-17 21:35
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- Predicting the 1991 eruption of Pinatubo- Luzon Philippines
- First Signs
- July 1990- EQ 7.7Killed 1600
- Next 7 weeks
- Study and debate
- Dismissed stem release
- Seismic Monitoring
- USGS- network of 7 seismometers
- 3D view of what was happening below surface
- Earthquakes- 8km below- 40-150/day
- Not usually high number- but spread over 5-6km
- USGS- network of 7 seismometers
- Gas Emissions
- Helicopters- gas samples using correlation spectometer
- History
- Last erupted C14th- no written record
- Study of deposits and flows of pyroclastic material showed it had only erupted 4/5 times in 2 millennia
- Infrequent events
- 3 June- largest tremors
- Issues level 2 Aert
- 5 June
- Earthquakes beneath central zone
- Sulphur dioxide levels falling
- 7th June
- Level 4 Alert
- Meanwhile
- 8-9 June
- First Signs
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