Monitoring local/regional seismicity (north-eastern Caribbean; Sombrero seismic zone) monitoring...
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Transcript of Monitoring local/regional seismicity (north-eastern Caribbean; Sombrero seismic zone) monitoring...
• monitoring local/regional seismicity (north-eastern Caribbean; Sombrero seismic zone)• monitoring volcanic activity (The Quill, Mt. Scenery)• contributing to the Caribean Tsunami Warning system
NA – Netherlands Antilles Seismic Network (since 2006)
KNMI (Netherlands Meteorological Institute)
MDNAA (Meteorological Service of the Netherlands Antilles and Aruba)
USGS
St. EustatiusSt. MaartenSaba
North
oil terminal
last eruption ~ 100 - 400 AD
last eruption ~ 1640
pyroclastic flows
Streckeisen STS-2 broad-band sensor
UPS
- local support, but limited technical knowledge
- air conditioned rooms
- automatic processing SeisComP3
- manual review SeismicHandler
SABA
SEUS
SMRT
Real-Time seismic stations in the Caribbean region
collected by KNMI / MDNAA using SC3
100 Hz
40 Hz
minimum phase filter,causal
linear phase filter,acausal
Willard interface
Quanterra Q330 filtering scheme
causal: no ‘ringing’, reliable onset picking, waveform distortion
acausal: possible ‘ringing’, no waveform distortion
ring buffer
fifo’s
high prioritythread
Linux
RT-Linux
DAC
polling& plot
network (SeedLink)
socket
ring buffer
data
handler
notifier
log-handler
40 Hz data
dt = 0.025 sec
dataerrors
drum recorder
http://www.realtimelinuxfoundation.org/
http://www.rtlinuxfree.com/
http://www.linux-real-time.com/