The Upgraded Seismic Network of PHIVOLCS

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The Upgraded Seismic Network of PHIVOLCS

• Bart C. Bautista
• Philippine Institute of Volcanology and
  Seismology (PHIVOLCS)
• Quezon City, Philippines

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The Philippine Institute of Volcanology and
Seismology (PHIVOLCS)

• (PHIVOLCS) is presently the main
  organizational body studying volcanoes and
  earthquakes in the Philippines.

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SEISMICITY OF THE PHILIPPINES (1608-2002)
Data sources NEIC for recent earthquakes
(1897-2002) Bautista and Oike for historical
earthquakes (1608-1896)
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Seismotectonic Setting
TECTONIC SETTING OF THE PHILIPPINE ARCHIPELAGO
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Pre-JICA Instrumentation

• SENSOR
• Hosaka vertical seismometer
• L-4 Mark seismometer
• Kinemetrics ranger SS-1 seismometer

• RECORDER
• Hosaka smoke recorder
• Teledyne portacorder
• Kinemetrics drum recorder
• Teledyne geotech helicorder

• SOFTWARE
• EQ Plotter

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Upgraded Network Phase 1
34 existing manned stations nationwide were
equipped with 3-component digital short-period
Seismographs and accelerographs
KELUNJI D-Series 24-bit Digital recorders IBM
PCs Kelunji drum recorders
S-13J PA-22
Teledyne Geotech seismic sensors
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Seismometers
Broadband seismometer
Short period seismometer
Strong motion seismometer
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THE UPGRADED NATIONAL SEISMIC NETWORK
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PHIVOLCS Unmanned Seismic System
GPS Antenna
CYGNUS Satellite Modem Transmitter
Solar Panel
VSAT Antenna
Charge Regulator
TRIDENT Digitizer
Battery
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Example of Instrumentations in Each
Satellite-telemetered Unmanned Station
Abra Station
Batteries and solar charger regulator
Seismic vault, solar panel and VSAT antenna
Digitizer and VSAT modem / transmitter
Three component short-period sensors
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PHIVOLCS Central Receiving Station
GPS Antenna
Data Acquisition Computer
CARINA Satellite Modem Transmitter Receiver
VSAT Antenna Receiver
UPS
AC Power
Data Archiving Computer
Data Processing computer
Emergency Power Generator
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Quezon City Central Data Receiving Station
VSAT Receiver Antenna
display of the data acquisition computer
Emergency Power Generator
Data Acquisition and Processing System
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Mirror Receiving Station at Tagaytay City
VSAT Receiver Antenna
Data Acquisition and Processing System
Emergency Power Generator
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Volcano Radio Telemetry Network
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Broadband Network

• Equipment Provided
• 9 Guralp CMG-3T broadband seismometers
• 2 Kelunji D-series 24-bit Data loggers (Phase 1)
• 7 Kinemetrics ALTUS K2 24-Bit data loggers (Phase
  2)
• IBM PCs

Testing of the GURALP CMG-3T broadband sensor
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CTBTO auxiliary station in Tagaytay City
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REGIONAL BROADBAND SEISMIC NETWORK (IRIS)
ICN
MAJO
KMI
TATO
BAG
MIDW
PLP
GUMO
KKM
KUM
KWA
PALK
DAV
KSM
PMG
HNR
DGAR
SeiscomP
WRAB
COCO
MBWA
CTAO
NWAO
LINUX Operating System with Internet Connection
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Maraming Salamat Po! Thank You Very Much
PHIVOLCS Bldg., C.P. Garcia Avenue, University of
the Philippines, Diliman, Quezon
City www.phivolcs.dost.gov.ph Telephone (632)
426-1468