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Tsunamis Detection
The Mission
Tsunamis Detection can help to minimize loss of
life and property from future tsunamis.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Introduction
Tsunamis Detection:
Tsunami disaster detection technologies
Information dissemination technologies
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
8/6/2019 TsunamiDetection Akhilendra Mishra
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Tsunamis Detection
Tsunami disaster detection technologies
Earthquakes cannot be predicted, resulting tsunamis
can be detected by seabed monitors and ocean
buoys leaving adequate time for evacuation.
Information dissemination technologies
However, the technology is a minor part of the
solution. A mechanism needs to be in place to
interpret alerts, relay the warning to localcommunities and enable them to undertake quick
action.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Lets take a look on an example of the overall
mechanism of the Tsunamis Detection.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
Ssystem
FunctionalitiesDetection of an
anomaly
Information
Dissemination
Conclusion
Web Resources
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TSUNAMETER -- Architecture
The system is composed of the following main
parts:
1. In underwater monitoring module (UM) installed
at the sea bed;2. A surface buoy (SB) moored in the area of the
UM;
3. An in water communication segment
connecting the UM with SB;
4. An onshore centre (OC) hosting a standard PC
server;5. A satellite communication segment connecting
SB and OC..
*Envirtech Tsunami Warning System as our reference.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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TSUNAMETER -- Underwater Monitoring Module (UM)
Two different classes of underwater modules to
comply with different types of applications.
They differ for the instrumentation embedded, in
consideration of the distance between
the tsunami-genic sources and the most close
coastal regions.
The maximum deployment distance is more than
1000 Km off shore. The maximum deployment
depth is 5000 meters.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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TSUNAMETER Surface Buoy
The SB is composed by a metallic pole and a
foam body having a diameter of 1.45 m. Themain parts installed on the buoy are:
1. The electronic box containing the SB Data
Acquisition and Communication System (SB-
DACS) relied on the same type of electronics of
the UM;
2. An autonomous power supply system composed
of 3 photovoltaic panels (12V- 50W each) and a
gel battery pack (12V- 400Ah);
3. A magneto-inductive surface modem or the
acoustic modem for the data link with the
underwater unit;
4. A satellite modem Inmarsat C for reliable data
connection with the Onshore Centre (OC).
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Tsunameter -- System Functionalities
The TWS provides the main basic
functionalities listed below:
1. Continuous measurement of the sea bottom
pressure with a rate of 15s, 30s, 1min, 2min,
5min selectable be the user in the OC.Optional monitoring of earthquakes
occurence.
2. On line processing of the pressure data with
a digital Kalman filter to detect a frequency
component typical of a tsunami: thethresholds for the detection of tsunami
waves can be configured by the OC user.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Tsunameter -- System Functionalities
3. The beginning of a possible event is
automatically triggered by the pressure
sensors (able to detect earthquake waves)
and also by the hydrophone/seismometer if
installed in UM.
4. The UM can start the tsunami detectionalgorithm also on user request from the OC
in case of identification of seismic activity
in the interested area.
5. Daily synchronisation of the SB and UM
clock with the GPS.6. Self-diagnostic and periodical notification to
the OC.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Tsunameter -- System Functionalities
7. Internal logging in UM and SB of all acquireddata, all detected events, all diagnostic
status and exchanged messages (black
box).
8. Remote configuration of the UM (change of
communication settings, filteringparameters, on/off of sensors and devices,
software updating).
9. Reception of commands from OC and
notification of its execution;
10. Reception of data request from OC and
reply with the requested data.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Tsunameter -- Detection of an anomaly
The main scenario in case of detection of ananomaly in the pressure signal is the following:
1. The UM-DACS in its standard operating mode
IDLE MODE detects an unexpected variation in
the pressure signal;
2. A notification message is sent to the OC and the
UM-MODULE changes in the new status ALARM
MODE;
3. In ALARM MODE the UM sends periodically a
message to the OC: on request the user in the
OC can transfer all pressure data acquired in
ALARM MODE.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Tsunameter -- Detection of an anomaly
4. In case of detection of a tsunami events(frequency component in the range
0.01..0.0005Hz) an TSUNAMI DETECTION
message is sent to the OC.
5. The user in the OC can verify the pressure dataacquired during the ALARM MODE to validate
the alarm condition and to verify its amplitude.
6. After the decrease of the tsunami wave
components under some minimal threshold(parameter remotely configurable by the OC
user) and after a period of some hours
(parameter remotely configurable by the OC
user), the UM chages from ALARM MODE to
IDLE MODE.
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Information Dissemination
The Tsunami Alarm System receives
earthquake and tsunami warning
information from a multiplicity of
seismic measuring stations and
tsunami warning stations fromdifferent countries.
Alarm being sent to your mobile
telephone
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Where does the Tsunami Alarm System work?
The Tsunami Alarm System works everywhere
in the world covered by the GSM network !
Information Dissemination
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Conclusion:
Key Components to an ideal TsunamiWarning and Response System:
1. Risk Assessment
2. Detection
3. Warning
4. Response Plan
5. Ready Public
6. Situational Awareness7. Lessons Learned
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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Web Resources
http://www.envirtech.org/envirtech_tsunameter.htm
http://www.noaa.gov/tsunamis.html
http://en.wikipedia.org/wiki/Tsunami_warning_system
http://www.tsunami.noaa.gov/warning_system_
works.html
http://topics.developmentgateway.org
http://www.envirtech.org/envirtech_tsunameter.htm
Mission
Introduction
Mechanism
Architecture
Underwater Monitoring
Module
Surface Buoy
System Functionalities
Detection of ananomaly
Information
Dissemination
Conclusion
Web Resources
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