• 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/