Transcript IUGG_NEARESTxNevio2 - Integrated observations from NEAR

NEAREST
Integrated observation from NEAR shore
sourcES of Tsunamis:
toward an early warning system
EC Project (FP6, 2006-2009)
Objectives:
• characterise near-shore potential tsunami sources
• detection of signals by a multiparameter seafloor
observatory for the development of an Early Warning
System Prototype
• numerical models for more accurate scenarios of tsunami
impact and elaboration of accurate inundation maps
Coordinator: ISMAR-CNR, Italy
Dr. Nevio Zitellini
Partners:
University of Lisbon, Portugal
Consejo Superior de Investigaciones Cientificas, Spain
Alfred Wegener Institut, Germany
University of West Bretagne, France
INGV, Italy
Technische Fachhochschule-Berlin, Germany
Istituto Andaluz de Geofisica, Spain
Istituto de Meteorologia, Portugal
Centre National pour la Recherche Scientif. et Techn.,
Morocco
XISTOS Development S.A., France
NEAREST
Pilot Experiment: Gulf of Cadiz
Highly populated and prone to
devastating earthquakes and
tsunamis (e.g., 1755 Lisbon
earthquake)
More than ten years of geological
and geophysical investigations off
SW
Iberia
(multibeam
bathymetry, side-scan sonar,
high-resolution and multichannel
seismics, and sampling which
probed the first kilometres of the
upper crust at various resolution)
Courtesy of SWIM project
Recognition and mapping of
active tectonic structures likely to
generate large earthquakes and
tsunamis.
NEAREST
Pilot Experiment: Gulf of Cadiz
•deployment (~ 1 y exp.) of GEOSTAR
multiparameter seafloor observatory (INGV)
+ 24 BB-OBSs (AWI)
(2200 ÷ 3200 m w.d.)
NEAREST
Pilot Experiment: Gulf of Cadiz
• real-time transmission of relevant parameters of
seismic and water pressure signals by GEOSTAR
Shore station
Integration of
transmitted
parameters in
the land-based
networks
database (from
Portugal, Spain
Morocco)
Satellite
Link
Acoustic
transmission
MODUS
GEOSTAR
NEAREST
Pilot Experiment - GEOSTAR
• Scientific multiparametric data
acquisition in relevant seismic source
site
• Real-time event (seismic and water
pressure) identification and warning
The GEOSTAR seafloor observatory equipment’s
• geophysical and oceanographic sensor
packages
• central acquisition, control units (central clock)
• data processing unit
• local memory storage
• acoustic communication system
GEOSTAR Main sensors
Sensor
Sampling
rate
Acquisition
100 Hz
Continuous
3-comp. Accelerometer
100 Hz
Continuous
Hydrophone
100 Hz
Continuous
Pressure sensor
15sec
Continuous
Gravity meter
1 Hz
Continuous
CTD + Transmissometer
1min
Continuous
ADCP
1 min
Continuous
3 comp. Currentmeter
5 Hz
Continuous
3-comp.
broad
Seismometer
band
Tsunami Detection
Procedure
Trigger on Pressure and Seismic events
• Seismometer: trigger on M>3.5-4. local seismic event
• Water pressure: detection of seafloor anomalous
pressure signals
• Warning for events occurrence
• Automatic processing for computation of sea level
variations (original algorithm) In case of
seismic/pressure event
• Pressure data transmission
Possibility to remotely modify the input parameters of the
algorithm (tidal coefficients)
IMPLEMENTATION OF FP6
ESONET (Contr. no 036851)
European Seas Observatory NETwork
Network of Excellence (NoE)
(2007-2011 – 7ME)
European
underwater ocean
observatory system
(to focus on the
margin and deep-sea)
Major aim: Integration of the scientific/technological
“Observatory Science” Community