TsunamiDetection Akhilendra Mishra

8/6/2019 TsunamiDetection Akhilendra Mishra

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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


Module

Surface Buoy



Information

Dissemination

Conclusion

Web Resources


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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


Module

Surface Buoy



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


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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



Information

Dissemination

Conclusion

Web Resources


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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


Module

Surface Buoy



Information

Dissemination

Conclusion

Web Resources


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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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



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


Module

Surface Buoy



Information

Dissemination

Conclusion

Web Resources


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TsunamiDetection Akhilendra Mishra

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