Download Seismic Monitoring in Hawaii

Seismic Monitoring in Hawaii
Kanoa Koyanagi
NOAA Pacific Tsunami Warning Center
[email protected]
Seismic Network Operators
NOAA Pacific Tsunami Warning Center (PTWC)
• Established in 1949 after the 1946 Aleutian Islands tsunami that
devastated Hilo, Hawaii.
• Operates 17 seismic stations throughout Hawaii.
USGS Hawaiian Volcanoes Observatory (HVO)
• Established in 1912 to monitor Hawaii’s volcanoes. Operated
continuously by the U.S. Geological Survey since 1947.
• Operates 60+ seismic stations on the Island of Hawaii.
USGS National Strong Motion Project (NSMP)
• Established in 1932 by the engineering seismology community
to record strong motion ground motion in urbanized areas.
• Operates 700+ stations in the U.S., 32 throughout Hawaii.
IRIS Global Seismic Network (GSN)
• Established in 1984 as a joint partnership between the National
Science Foundation’s IRIS Consortium and the USGS.
• Operates 150+ high quality broadband stations, 2 in Hawaii.
December 2011
PTWC Field Hardware
Broadband + StrongMotion Sites:
all of the following:
• Streckeisen STS-2
broadband seismometer
• Kinemetrics EpiSensor
ES-T accelerometer
• Kinemetrics Q330
digitizer
• Kinemetrics Marmot
field server
Strong-Motion +
Short-Period Sites:
either
• Kinemetrics Basalt
digitizer/field server with
embedded EpiSensor
ES-T accelerometer
or
• NetDAS digitizer/field
server with Metrozet TSA100S accelerometer
+
• Some sites with
additional GeoTech S-13
short-period vertical
seismometers
Site Photos
Combination of existing
vaults with newly
constructed vaults.
Mauna Loa, Hawaii
Kekaha, Kauai
Haleakala, Maui
Seismic Data Acquisition
Antelope
• Import Q330 (orb2orb)
• Data export to IRIS
(orb2orb ?)
Earthworm
• Import Basalt
(slink2ew), NetDas
(grf2ew)
• Data exchange with
HVO (import/export),
IRIS (liss2ew), NSMP
Seismic Data Processing
Location
•
•
SPLERT (System for Processing Local Earthquakes in Real Time) – an
Earthworm-based legacy system
Earthworm v7.5 – eq_assemble and eqproc, pick_ew, binder, hyp2000
Magnitude
•
•
SPLERT Pmag (for paging),
eqcoda (MD), localmag (ML)
Mwp processing for events
larger than ~M6.0
Performance Goal
•
To issue local Hawaii tsunami
bulletins within 90 seconds of
origin time.
PTWC Data at IRIS DMC
Data exported to and
archived by the IRIS DMC
since September 2011.
Mahalo
(Thank You)