Seismic network - GEOFON Program GFZ Potsdam

GEOFON – Seismological
Infrastructures, Global Seismic
Monitoring and Tsunami Warning
Winfried Hanka
GFZ German Research Centre for Geosciences
Potsdam, Germany
SCUG3 Meeting, Potsdam,September 21, 2010
GEOFON – Cooperation is the Key!
GEOFON tries
● to promote international broadband seismology in Europa and
worldwide and
● to obtain maximum impact from minimum resources by intensive
cooperation on all levels.
It
● deploys permanent stations (~80), primarily as nuclei for adequate
national networks (> 400 stations)
● develops software (SeisComP) for cooperative distributed
● real-time data collection (SeedLink => MEREDIAN)
● data archival & distribution (ArcLink => NERIES)
● real-time data processing (SC3 => early warning projects)
● provides several services to the community
● technical support on several levels
● backup data archival (GEVN, EIDA)
● earthquake information (EMSC, TWS)
GEOFON Permanent Seismic Network
GEOFON/WM: 79 stations
GEOFON Extended Virtual Network
GEOFON/WM: 77 NRT stations (+2 offline)
GEVN ~ 750 stations
Why Global Earthquake Monitoring is a Task for GEOFON?
Trigger: The Boumerdes (Algeria) Mw=6.8 earthquake of May 25, 2003
Insufficient public informations!
No first-hand informations!
No notification service!
Infos primarily from news media!
2266 casualties in Algeria - 3 m tsunami on Balearic islands
Seismic Data Processing at GEOFON Data Center
Other Earthquake and Tsunami Centres
SC3
Messages
Real-Time
Data
Seismic
Waveforms
Earthquake
Information
GEOFON
Stations
Internet
SeedLink
Server
SeisComP3
Server
VSAT
GEVN
Stations
Offline Data
(temp. nets)
Network
Management
Operatoring
QC Analysis
SUN Cluster
Waveform
Archive
Earthquake
Database
ArcLink
Server
Waveform + Metadata
EIDA/GIDA
ArcLink Servers
Analyst
Performance of GEVN Earthquake Monitoring System
Automatic alerts >= 25 phases
Location Distance
Time Delay
What has GEOFON to do with Tsunami Warning?
=> GITEWS Project
GITEWS
The Great Challenge: Tsunami Warning for Indonesia
Tsunami travel times 20 - 40 min => warning time line < 5 min!
GITEWS Seismic Network for the Indian Ocean
Yemen
Sri Lanka
Kenya
Maldives
Madagascar
Indonesia
How can Seismology help Tsunami Warning?
Standard concept for regional and national TWS:
the Decision Matrix
Recent Proposal for NEAMTWS
Confirmation by sea level measurements required!
GITEWS
Tsunami Warning in 5 min – a great challenge!
GITEWS Strategy:
1st step: 5 min warning issued on basis of the most probable pre-calculated
tsunami scenario related to the actual seismic parameter set!
Seismic network
● as many seismic stations as possible close to the trench
● BB, strong motion and CGPS sensors
● private VSAT links
Seismic data processing
● rapid automatic determination of epicenter
and depth range of rupture start
● non-saturating magnitudes for regional
distances
● determination of rupture direction (if possible)
Pre-calculated tsunami scenarios
● selection from thousands of pre-calculated
tsunami scenarios on basis of continuously
updated seismic parameters
GITEWS
The Challenge: Tsunami Warning for Indonesia
2nd step: verification by ocean and coastal sensor systems!
Ocean Bottom Unit
(pressure, seismic sensor)
Tide Gauge
GPS Buoy
3rd step: continuous update of warning status
(new tsunami scenario?)
GITEWS Tsunami Warning Concept – a “System of Systems”
GITEWS
Earthquake
monitoring system
Sensor Systems
CGPS
Tide guages
OB pressure sensors
GPS Buoyes
EO Data
Measurements
Simulation DB
local authorities
exposed population
more national and
international recipients
Situation evaluation and decision support
SeisComP3 at BMKG – Virtual Seismic Network
CSM
Libra
CGI
CSM/GITEWS
JISNET
(NIED,
Japan)
BMKG Net
CEA System
IMS Net
(CTBTO)
NAQS
BMG LAN
WIN
CN Net
(CEA, China)
CTBTO System
sc-acqui
(GITEWS)
GFZ
GITEWS VSAT
Indonesia
Maldives
(Sri Lanka)
Internet
Malaysia
Australia
GEOFON
IRIS
GEOSCOPE
GITEWS
SeisComP3 Software
Present Status:
● Real-time acquisition of virtual seismic
networks: (GFZ > 750 stations)
● Visualization of overall situation (earthquake
sources and network status)
● Automatic picking of seismic signals
● Automatic pick association and localisation
● Automatic determination of ground velocity
● Automatic determination of different fast
magnitudes (Ml, mb, mB, Mw(mB), Mwp,
Mj(bmg))
● Manual verification of automatic solutions
● Manual event definition and analysis
● Moment tensors and rupture parameters
(under development)
GITEWS
Successful Operation of SeisComP3 at BMKG –
Example of the Bengkulu Quake
September 12, 2007: first successful “home-made” tsunami alarm at BMG < 5 min !
BMG: M=7.9
GFZ: M=7.9
PTWC: M=7.9
NEIC: M=7.9
JMA: M=7.9
4.66S 101.11E 10 km issued 11:14:42 04:21 min
4.66S 101.13E 10 km issued 11:16:32 06:10 min
4.5S 101.3E
issued 11:24
14 min
4.369S 101.557E 15 km issued 11:29
19 min
4.5S 101.3E
issued 11:36
26 min
SC3 man
SC3 auto
man
man
man
Distributed SeisComP3 Systems throughout the
Indian Ocean – GFZ Background Support
GITEWS
Internet
INCOIS
(India)
GFZ
(Germany)
Internet
Thailand
Malaysia
...
Internet
NSOC
(Yemen)
South
Africa
...
Madagascar
Kenya
Tanzania
Pakistan
NMC
(Maldives)
Sri Lanka
...
...
Western Indian Ocean
Waveforms
Parameters (QuakeML)
Waveforms + Parameters
Eastern Indian Ocean
Internet
BMKG
(Indonesia)
GITEWS
GITEWS/GEOFON VSAT Communication
Express AM22/AM1 Europe wide Ku Beam
Telkom 2 C Band
CROSAT (Vienna)
Arabsat BADR 4 Ku
Intelsat
Intelsat IS10 Africa Ku Beam
BMKG
Upgrade of GEOFON Stations in NEAMTWS Area
Cooperation with WM network
Implementation started
Cooperation with NOA
Implementation underway
Stations
upgraded
VSAT connection establ.
(Monaco/EMSC project)
GITEWS
Distributed SeisComP3 System for Interim NEAMTWS
Private National Stations
INM
(Tunisia)
CEA/EMSC
(France)
Private IP
Network
IGN
(Spain)
IMP
(Portugal)
NOA
(Greece)
KOERI
(Turkey)
GFZ
(Germany)
SunCluster
Internet
Backbone Stations
Waveforms
Parameters (QuakeML)
Public European & Global Stations
Private National Stations
CTBT Stations?
ArcLink Network Concept
DB synchronization
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node
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DB
Pr
co ima
nn ry
ec
tio
n
Client
n
Active
ArcLink
node
Passive
ArcLink
node
EIDAC – European Integrated Data Center
GEVN (Global)
IOTWS/NEAMTWS
Temp. Nets
VEBSN
ODC
Sync
GFZ
Distributed Archives
connected by ArcLink
& SeedLink
Multi-national
Data Archives & Portals
FDSN/IRIS
SeedLink/ArcLink
Network
User
....(ETH)
NA2/NA3
INGV
Italian
Networks
IPGP
French
Networks
National Data
Archives & Portals
Real-Time Data
Offline Data
Temp. Net Data
ArcLink Requests
WebDC.eu Portal – Event+Station+Time Window Selection
GITEWS
Thank you very much!