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Tsunami Warning System of SCS
Zhao LiandaNational Marine Environmental Forecasting Center (NMEFC), SOA
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Tsunami warning system
State Council
Emergency departments
Local governments
Medias
1 、 Tsunami warning framework
CEA
Tide gauges
PTWC
Tsunami buoys
Earthquake
Water-level
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• 2.1 tide gauge stations
• 2.2 tsunami buoys in SCS
2 、 Monitoring
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2.1 、 Tidal Gauge Stations, SOA
State Oceanic Administration of China (SOA) has established a
tide gauge stations network to monitor sea
level change. The monitoring net work was composed coastal tide gauges and island tide
gauges.
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Friday, April 21, 2023
December 26, 2006 年 ,occurred in the south of Taiwan Island
ChongWu tide gauge station recorded 7.8 cm tsunami wave after 3.4 hours of earthquake ( right-up map ) ; DongShan tide gauge station recorded 10 cm tsunami wave after 3.2 hours of earthquake ( right-middle map ) ;HongKong Observary recorded 10 cm tsunami wave ( right-below map ) 。
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Two tsunami buoys will be purchased and deployed in SCS.
We will get real-time data from tsunami buoys in the latter half of the next year.
2.2 Tsunami monitor buoys
the locations of two tsunami buoys
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3 Quantitative Tsunami Forecast System
∂qx∂ t
=−ghζ −ξ ∂ζ∂x
∂qy∂ t
=−ghζ −ξ ∂ζ∂y
∂ζ∂ t
=−∂qx∂x
−∂qy∂y
∂ξ∂t
(H
1
,h
1
)
(H,h)
Numerical modeling
量的津波データベース
量的津波データベースDatabase
Parameters input
Results
1010 minutesminutes
Epicenter determination
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Thank you
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Hypothesis tsunami earthquake epicenters
235 epicenters are determined in 10-32N , 105-132E, covering the Ryukyu and Manila Trench
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For each epicenter, 30 (5*6) tsunami cases:
Magnitude (Mw): 6.5, 7.0, 7.5, 8.0, 8.5
Focal depth (km): 0, 20, 40, 60, 80,100 Mass computing, all about 7050 ( 235*30 ) tsunami
events case. The results are loaded into database. The database will expand in future
Some computing files
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Tsunami forecast system based on database and GISTsunami forecast system based on database and GIS
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Tsunami forecast results display.Different color divide coastline. Each frame gives tsunami wave height and arrival time. Different color of frames represents different impact.
Tsunami forecast results display.Different color divide coastline. Each frame gives tsunami wave height and arrival time. Different color of frames represents different impact.