StrongStrong--motion Observation motion Observation N t k f NIEDN t k f NIEDNetworks of NIED:Networks of NIED:KK--NET and KiKNET and KiK--netnetKK NET and KiKNET and KiK netnet

National Research Institute for Earth Science and Disaster Prevention (NIED)H. Fujiwara, S. Aoi, T. Kunugi and S. AdachiH. Fujiwara, S. Aoi, T. Kunugi and S. Adachi

Seismic observation networks of NIED

Observation sites of K-NET and KiK-net

Ｋ－ＮＥＴ (1034 sites)

ＫｉＫ－ｎｅｔ(660 sites)sites) (660 sites)

Ｋ－ＮＥＴＴ

KiK-net

K-NET95Seismographs

(1034points)

JMA Emergency Information Receiver

Data Acquisition Equipmentq q p

DataBase ServerWWW Server

WWW Mirror Site #1 WWW Mirror Site #2DAT/MO

WWW o S te # WWW o S te #

INTERNETINTERNETOff-line Data Service

The home page of K-NET and KiK-net

http://www.k-net.bosai.go.jp http://www.kik.bosai.go.jp

Site informationＫｉＫ－ｎｅｔ Ｋ ＮＥＴＫｉＫ ｎｅｔ Ｋ－ＮＥＴ

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アクセ

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4 0 0 00

The number of files released from K-NET

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35000

ル数

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ファイル

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5 000

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（2000 10/6 13:30 M7.3）

Tottori-ken Seibu Earthquake

Distribution of peak acceleration on the surface

Acceleration waveforms at Hino stationDistribution of downhole acceleration

Tottori-ken Seibu Earthquake (Mj 7.3)

2000 10/6 13:30 The earthquake occurred.

13:35 Data acquisition was started13:35 Data acquisition was started.

～ 16:30 Impossible to communicate.

20:15 Strong-motion records from 221 sites were obtained.

23:00 Strong-motion records from 272 sites were obtained.

10/7 0:20 The peak acceleration map was released on the home pagewas released on the home page.

The 2003 Tokachi-oki earthquake (2003 9/26 Mj 8.0)

PGA PGV

Made from strong-motion records

Numerical Simulation

The 2003 Tokachi-oki earthquake (Mj 8.0)

2003 9/26 4:50 The earthquake occurred.

4:53 Data acquisition was started.

Dial up operationDial up operation encountered delays caused by jammingby jamming

communication line.

9:45 Strong-motion records from 300 sites were obtained.

10:25 The peak acceleration map was released on the home page.

New system for Ｋ－ＮＥＴ

Old system New system

Dial up from DMC to each station using 25 ISDN lines

Automatically dial out from each station to DMC using 460 ISDN linesSeismic intensity:

10～30 minutes

460 ISDN lines

Seismic intensity: 2 minutes

Waveform data: Half day Waveform data: ＜10 minutes

The flow of JMA Seismic Intensity data in the new K-NET systemThe flow of JMA Seismic Intensity data in the new K-NET system

JMAFR network

Route AJMA

seismic Intensity

NIED Within 2 min.

LocalRoute BInformation network of

Local Governments

JMA seismic Intensity

i hi 0Within 70 sec.

Distribution of the new K-NET stations

The blue circles indicate stationsThe blue circles indicate stations in the area where the strong-motions due to the Nankai or T k i h k dTonankai earthquakes are warned.(420 stations)

The red circles indicate stations in the area where the strong-motion due to the Miyagi-okimotion due to the Miyagi oki earthquake is warned.(23 stations)

Comparison between K-NET95 and K-NET02

K-NET95 (Old-type) K-NET02 (New-type)

Max. measurable Acc. 2000 Gal 4000 GalMax. measurable Acc. 2000 Gal 4000 Gal

Dynamic range (RMS/F.S.) 19bit（114dB） 22bit（132dB）

Scale factor 0.24 mgal/COUNT 0.63 mgal/COUNT0.24 mgal/COUNT 0.63 mgal/COUNT

Power consumption 16W 35W (5W in low power mode）

Sensor(Accelerometer) V403-BT(Akashi) FBA-ES-DECK(Kinemetrics)

JMA seismic intensity × ○

Data communication RS-232C IP (+ RS-232C）

Recording capacity 8MB 512MBProgrammable by user × ○ (Linux OS）

Continuous data × ○

S ensor m odule

UPSRouterGPS

Digitaltelephone line

AC100V

3 com ponentaccelerarom eter

UPS10BASEDC12V

DC5V C om m unication m oduleM easurem ent m odule

10BASE

DC5V・A/D converter・sensor controll・recording event data・battery back-up

・calculation of JM A intensity・recording event data・recording continuous data・realtim e data com m unication

10BASE

C P U 1(Linux O S )

・basic function of seism ograph ・advanced processing

C P U 2(Linux O S )

Renewal of the K-NET Operation of new K-NET ill t t f 2004/6/1 !will start from 2004/6/1 !