Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki...
-
Upload
charlotte-sims -
Category
Documents
-
view
215 -
download
0
Transcript of Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki...
![Page 1: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/1.jpg)
Dense O cean floor N etwork system for E arthquakes and T
sunamis ( DONET)
Dense O cean floor N etwork system for E arthquakes and T
sunamis ( DONET)
Yoshiyuki KANEDA Yoshiyuki KANEDA DONET GROUPDONET GROUP
Department of Oceanfloor Network System Development for Earthquakes and TsunamisDepartment of Oceanfloor Network System Development for Earthquakes and Tsunamis
DONETDONETJapan Agency for Marine-Earth Science ant TechnologyJapan Agency for Marine-Earth Science ant Technology
JAMSTECJAMSTEC
![Page 2: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/2.jpg)
Previous research in the Nankai trough
NANKAI TROUGH
KII peninsula
year age A B C
1605 KEICHO
1707 HOUEI
1854 ANSEI
1944 SYOWA
1946 SYOWA
Historical EQs. in the Nankai trough
A;Nankai EQ.B;Tonankai EQ.C;Tokai EQ.
?
PSP
![Page 3: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/3.jpg)
Distribution of significant deep structures along the Nankai Trough
![Page 4: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/4.jpg)
Tonankai
TokaiNankai
111 years
7days
103 years
97days
①①
②②
③③
103years
97days
TonankaiNankai③③
111 years7days
Tonankai +Tokai
Nankai②②Tonankai +Nankai
①①
The results of mega-thrust EQ. recurrencecycle simulation in the Nankai trough
![Page 5: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/5.jpg)
Advanced Ocean Floor Cable System
Outline & Concept
Image
![Page 6: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/6.jpg)
Ocean floor cable network system as MEXT project
Sensors
over20Seismometers
20 Pressure gauges
![Page 7: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/7.jpg)
Outline of ocean floor cable system
Landing Station
Backbone cable system
Brunch unit
Sensor systemSeismometers,
Pressure gauge
・ Extendable Advanced Sensor System・ Replaceable Observatory Node
・ High Reliability Backbone Cable SystemSystem Concept
![Page 8: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/8.jpg)
Seismometer
Pressure gauge
Other
Broadband seismometer
Strong motion accelerometer
Sensors
![Page 9: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/9.jpg)
9
Seismometer evaluation based on the frequency bands
![Page 10: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/10.jpg)
Case 1
Case 2 Case 3
Installations of Sensors
![Page 11: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/11.jpg)
・ Speedy evaluation and notification for earthquakes and tsunamis.
・ Provide observed data such as ocean floor deformation derived from pressure gauges to improve the simulation and modeling researches about the mega- thrust earthquakes. (Data assimilation)
・ Understanding of the interaction between the crust and upper mantle around subduction zone.
Data Application
![Page 12: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/12.jpg)
Maintenance systems of JAMSTECMaintenance systems of JAMSTEC
3000m Class ROV 「 HYPER-DOLPHIN 」
7000m class deep sea ROV「 KAIKO7000 」
Deep Sea Cruising AUV 「 URASHIMA 」
![Page 13: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/13.jpg)
Technology developmentTechnology development
Cable extension system development
![Page 14: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/14.jpg)
Network Array Planning
Advanced Ocean Floor Cable System
![Page 15: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/15.jpg)
Network array planning
Kii PeninsulaTonankai Seisomogenic Zone
Nankai Seisomogenic Zone
sensor
node
Back bonecable
![Page 16: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/16.jpg)
Advanced Ocean Floor Cable System
Image
![Page 17: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/17.jpg)
The resolution test of hypocenter determination using oceanfloor network
Network Array Good resolution!!
![Page 18: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/18.jpg)
▲: Land GPS and Pressure gauge
Resolution
・ Land GPS :horizontal; 1mmvertical; 3mm
・ Pressure gauges: 10mm
Ocean network system(36 pressure gauges)+ Land GPS
The checker board test for offshore geodetic data analyses
Land GPSModel
40 km square checker boardSlip rate : ±1m
Good resolution!!Around network array
![Page 19: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/19.jpg)
Advanced Ocean Floor Cable System
Sensors 1) Multi seismometers for ・ Broad band phenomena ・ Strong Motion ・ Micro EQs.2) Precise pressure gauges for ・ Tsunami ・ Ocean floor deformation3) Data s t o rage function at the trouble
Under development* Precise ocean floor deformation monitoring system* Advanced in lined sensor cable system
![Page 20: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/20.jpg)
Provide the estimated results before arriving seismic wave in populated area
Observe seismic wave by network
・ Magnitude・ Focal mechanism・ Asperity area
Synthetic waveform
Research on real time estimation of source elements using network data (regional analysis)
K-net
Ocean floor network
Tonankai Eq.
Analyze with theoretical data
Database
①
②
③
Gather data
④⑤
Construct source model and pre-estimate Tsunami waveform
Analyze③
Structure model by JAMSTEC
![Page 21: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/21.jpg)
Data assimilation : using pressure gauge data as ocean floor deformation monitoring Keyword: Long term observatory
Improve the simulation model
![Page 22: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/22.jpg)
Observation data
Data assimilation
Predict 2
Predict (n)
Time range for data assimilation
Optimization
time
Long-term predictusing predict (n)
time
Without improvement
Improvement
Improvement Simulation model
![Page 23: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/23.jpg)
Network data flowNetwork data flow
Network
Land Station
JAMSTECData center
JMAOthers
analyses
analyses
![Page 24: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/24.jpg)
Advanced Ocean Floor Cable System
Image
![Page 25: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/25.jpg)
Sensors
・ over20 Seismometers・ 20 Pressure gauges
Project・ FY2006-FY2009 4 years
![Page 26: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/26.jpg)
System Concept
・ Redundancy, Extension and advanced maintenance system using the looped cable system, junction boxes and the ROV/AUV etc.
・ Speedy evaluation and notification for earthquakes and tsunamis.
・ Provide observed data such as ocean floor deformation derived from pressure gauges to improve the simulation and modeling researches about the mega-thrust earthquakes.
・ Understanding of the interaction between the crust and upper mantle around subduction zone.
Data Application
Keywords: Landing both cable end, Node, Brunch unit
![Page 27: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/27.jpg)
Park et al. (2002)
Philippine sea plateSeismogenic zone
Nankai trough
Target point
Future PlanFuture Plan
Borehole observatory will be connected with Ocean Floor Network System
![Page 28: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/28.jpg)
Future Network for Geosciences
Now we are here!!
![Page 29: Dense O cean floor N etwork system for E arthquakes and T sunamis ( DONET) Yoshiyuki KANEDA DONET GROUP Department of Oceanfloor Network System Development.](https://reader035.fdocuments.in/reader035/viewer/2022062713/56649cec5503460f949b8a3e/html5/thumbnails/29.jpg)
29
Future PlanFuture Plan
Buoy systems
AUV
Ocean floor network systems
Satellite systems
Aero systems