Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
The M6.7 EQ
• Depth ~11 km.
• Thrust mechanism.
• Landslides triggered.
• Undersea; a local tsunami alert was issued following the quake but was soon cancelled.
• At least 48 killed, 92 missing, 100 injured;
• Many buildings damaged or destroyed; at least 11 bridges damaged.
Tectonics of Philippines: A Broad View
(Bird, 2003)PhilippinesSunda plate Philippine Sea plate
(Yumul et al., 2008)
East
Luz
on T
roug
h
Philippine Trench
Man
ila T
renc
h
Sulu T
rench
Neg
ros
Tren
ch
A Closer View
Volcanoes
Mt. Pinatubo
(Yumul et al., 2008)
East
Luz
on T
roug
h
Philippine Trench
Man
ila T
renc
h
Sulu T
rench
Neg
ros
Tren
ch
Major Faults
Philippine Fault, ~1200 km long
1948 M8.1
1976 M8.0Tsunami. 8000+ killed.
Seismicity
Significant Earthquakes (M 7.5+) in History
8000+ killed
5000+ killed
Cross-sections of seismicity
(Bautista et al., 2001)
Cross-sections of seismicity: Moving Southward
Tomography
(Gorbatov et al, 2003)
(Gorbatov et al, 2003)
Bulk sound velocity Shear velocity
Resolution Test
Bulk sound velocityInput model Shear velocity
Slide Number 1Slide Number 2Slide Number 3Slide Number 4Slide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Tectonics of Philippines: A Broad ViewA Closer ViewVolcanoesMajor FaultsSeismicitySignificant Earthquakes (M 7.5+) in HistoryCross-sections of seismicityCross-sections of seismicity: Moving SouthwardTomographySlide Number 22Resolution Test