The development ofK-SEIS (Korea Speedy Earthquake Information System)
including EEW (Earthquake Early Warning)Jung-Ho Park, Heon-Cheol Chi, Iin-Seub Lim
2012. 10. 30

KIGAM(Korea Institute of Geoscience & Mineral Resources)

Out line Seismicity and monitoring network in Korea
 K-SEIS (Korea-Speedy Information System) RTiCOM (Real Time Intensity Color Mapping) EEW (Earthquake Early Warning)

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The seismicity is not so high nowadays in Korea.
Ml < 3.0
Number of Eq. events
60

40Avg 43.6
20

Avg 19.2

Year (1978 ~ 2011)

Ml >= 3.0
(from http://kma.go.kr)
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Historical Literatures recorded many
destructive damages by earthquakes.
•Koryo Dynasty (高麗時代 : 936~1393)- Koryosa (高麗史)- Koryosajeolyo (高麗史 節要): 193 earthquakes are reported

July, 23, 1036

The ground was shaken, whichbrought

about collapse of

traditional wooden

house atKasung, Kyeongju and so on.
Shaking continued for three days
at Kyeongju.

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Historical Earthquakes

Seismicity was very active from 16 to 17 century (Baag, 2004).

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Seismic Networks belong to major Organizations
NE

6/28

Modern digital seismic stations
Short Period and Acc. Station

Broad Band and Acc. Station

7/28

Near real time data exchange system

Stations

KMA

University

Buffer

KISS

KISS

Industries
OthersAntelop

KIGAM

Stations

Stations

BufferKISS

Buffer

KISS

KEMS

KEMS

Stations

Buffer

KOGAS

Stations

KISS

BufferKEMS

KEMS

Stations

KINS

Buffer

KEPRI

KISS

KISS

KTX

KEMS

8/28

Out line Seismicity and monitoring network in Korea
 K-SEIS (Korea-Speedy Information System) RTiCOM (Real Time Intensity Color Mapping) EEW (Earthquake Early Warning)

9/28

K-SEISRTICOM,
RTICOM, EEW,
EEW, && ShakeMap
ShakeMap

RTICOMEEW

ShakeMap

10/28

Real Time Intensity Color Mapping(RTICOM) : Odesan Eq.

2007.1.20 Ml4.9- PGA Monitoring in every second

11/28

1 secDigit Values

2000

Max.

1000

Average
DC drifting

0Min.
-1000

020406080

100120

Number of Samples (20 sps)

Schematic display of Min., Max. and DC drifting in acceleration data (Chi et al., 2004)

12/28

Real Time Intensity Color Mapping(RTICOM) : Odesan Eq.

RTICOM (Real Time Intensity Color Mapping)2007.1.20 Ml4.9

13/28

EEW Simulation
Odesan Eq.

Time : 1 sec– Waiting for event

2007. 1. 20
Magnitude 4.914EEW Simulation
Odesan Eq.

Time : 3 sec– Event detected:N37.69 E128.67 Magnitude unknown2007. 1. 20
Magnitude 4.915

EEW Simulation
Odesan Eq.

Time : 4 sec– Event detected:N37.69 E128.67 M 4.5

2007. 1. 20
Magnitude 4.916EEW Simulation
Odesan Eq.

Time : 6 sec– Event detected:N37.69 E128.56 M 4.5

2007. 1. 20
Magnitude 4.917Odeasan Eq.(2007.1.20) attenuation

Line ALine B
Mw: 4.7, Depth: 13km
(Cho & Baag, 2003)

Acceleration (gal, cm/sec2)

1001010.1

0.01
110
100
Epicentral Distance (km)

1000

18/28

Instrumental PGA Map Odeasan Eq. M4.9

19/28

ShakeMap simulation for point and line source

20/28

시간(local time)위도(lat.)경도(long.)규모(Magnitude)

KMA

22:12:19

34.58

128.12

3.3

K-SEIS®

22:12:19

34.54

128.132.2(MPd 3.10, Mtaup 1.33)

시간(local time)위도(lat.)경도(long.)규모(Magnitude)

KMA

22:12:19

34.58

128.12

3.3

K-SEIS®

22:12:19

34.54

128.132.2(MPd 3.10, Mtaup 1.33)

1st E-mail Alert
9 Trigger

2nd E-Mail Alert
10 TriggerFinal Alert
KMA 통보
22:16:00

Event Origin
22:12:19020

Waiting Time

30

1525
40

3550

45
13:00

70
1080
2030

1st Trigger

22/28

Ordinary Eq. Inform. from KMA

Messages from EEW
Local Time2012. 9. 27. 10:25 PM

5 min faster >2012. 9. 27. 10:30 PMOrigin Time : 09:27 13:24:47 GMT

Pd M : 3.1

Ml : 2.7

Pd M : 3.4

23

Goal: evaluation of existing early warning methodologies
in real-time specifications for integrating methodology
at-site at-site

Onsite Warning
integrated c , PdKISS

Virtual Seismologist
Peak amplitudes
Likelihood function PVA/PVD

waveform

ElarmS& pmax , Pd / v

parameter

Performance
Integrated
Testing
EEWCenterSystemPRESTo
integrated

P Displacement
Probability function

KISSClient

24/28

Test of PRESTo

2012/05/11 Ml 3.9 Muju Eq.Off-line simulation

 PRESTo (Probabilistic and evolutionaRy Early warning SysTem) by Zollo et al.

25/28

Evaluate density of seismic stations
P wave detection time
•P wave velocity: 6 km/s
•Focal depth: 8 km
•Telemetry: 8 sec•Processing time: 5 sec•Grid size: 0.05 degree•Detection threshold: 6 stations•132 stations considered Need more qualified stations

26/28

Delay time in real time data retrieve

 Using KISS network
 Need to shorten data delay time.
Delay time form stations to main center

2010/11/04 Status of stations

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Summary

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Thank you