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Strong Ground Motions

Earthquake in Noto Peninsula, Ishikawa Pref. on June 3, 2024
(Mj6.0, Mw5.8)
IISEE, Building Research InstituteThis report contains preliminary analysis results.

Observed PGAs/PGVs (Horizontal comp.)
cm/s2
2

470.5 cm/s
KiK-net Suzu
(ISKH01)

BRIcm/s

38.0 cm/s2
KiK-net Suzu
(ISKH01)

537.4 cm/s2
K-NET Shoin(ISK002)32.6 cm/s2
K-NET Otani(ISK001)

739.7 cm/s2
JMA 47274

30.4 cm/s
JMA 47274○: NIED stations, □: JMA seismic intensity stations※ PGA and PGV are the maximum values of vector summation in the horizontal components.

Observed PGAs/PGVs (UD comp.)
cm/s2

BRIcm/s

2418.5 cm/s
KiK-net Suzu
(ISKH01)505.1 cm/s2
K-NET Shoin(ISK002)354.1 cm/s2
KiK-net Uchiura(ISKH03)○: NIED stations, □: JMA seismic intensity stations

Observed PGAs/PGVs vs GMM (Si & Midorikawa, 1999)

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NIED stations
JMA stations※ Horizontal axis is not the “shortest distance to the fault”.
※ PGA/PGV values are the larger of the maximum values of NS and EW components.
※ Inland earthquake (Mw=5.8, depth=10 km) is assumed for the estimation.
※ Estimated values beyond 100 km (dashed line) are shown as reference values.

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Pseudo-velocity response (pSv: 1‒2 s, h=5%)

ISK002

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Attenuation characteristics of response spectra (h=5%)

NIED stations
JMA stations

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Summary
K-NET station Shoin (ISK002) shows larger PGA and PGV.
Response of pSv >165 cm/s (h = 5%, T=1–2 s) were not observed.

Acknowledgments:
We used K-NET and KiK-net strong-motion data provided bythe National Research Institute for Earth Science and Disaster Resilience; NIED), Japan (https://www.doi.org/10.17598/NIED.0004)
We also used strong-motion data from the Japan Meteorological Agency (JMA) seismic intensity stations.
We used hypocenter information, rapidly determined by JMA, and moment magnitude, determined by NIED F-net.
Response spectra were calculated using the subroutine program developed by Osaki (1994).
Figures were prepared using Generic Mapping Tools (GMT: Wessel and Smith, 1998).

BRI600Acceleration

2000

NS (peak: 370.3 cm/s²)

Acceleration Response (h=5%)
NSEW
UD01500-600600Sa (cm/s²)

EW (peak: 425.7 cm/s²)

0-600
600

1000500UD (peak: -505.1 cm/s²)00-6000100

10203040Time (s)Velocity Response (h=5%)50306070

Displacement Response (h=5%)

2000

NSEW
UD

80

080

123
Period (s)

4NSEW
UD

5

Sa-Sd curve (h=5%)0.5s

Acc. (cm/s²)

Acc. (cm/s²)

Acc. (cm/s²)

Ground motion at ISK002 (Shoin)

NSEW
UD

1500
Sa (cm/s²)

60

Sd (cm)Sv (cm/s)

20401s1000

101.5s

500

202s
2.5s

000123
Period (s)452024/06/03 06:31:27 at ISK002: K-NET station, Intensity: 5.200123Period (s)4501020Sd (cm)

30

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600

Acceleration

2000

NS (peak: 306.0 cm/s²)

Acceleration Response (h=5%)NSEW
UD01500-600
600

Sa (cm/s²)

EW (peak: -311.6 cm/s²)

0-600
600

1000

500

UD (peak: 107.8 cm/s²)00-6000100

10203040Time (s)Velocity Response (h=5%)

5060

70

Displacement Response (h=5%)

30

2000

NSEW
UD80

080

123Period (s)4NSEWUD

5Sa-Sd curve (h=5%)0.5s

Acc. (cm/s²)

Acc. (cm/s²)

Acc. (cm/s²)

Ground motion at ISK001 (Ohtani)

NSEW
UD

1500
Sa (cm/s²)

60

Sd (cm)Sv (cm/s)

20401s1000

101.5s

500

202s
2.5s

000123
Period (s)4500123
Period (s)450102030

Sd (cm)2024/06/03 06:31:28 at ISK001: K-NET station, Intensity: 5.2

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600

Acceleration

3000

NS-S (peak: -457.2 cm/s²)

NS-S
EW-S
UD-S

0-600
600

2000
Sa (cm/s²)

EW-S (peak: 300.7 cm/s²)

0-600
600

1000
UD-S (peak: -418.5 cm/s²)00-60010010203040
Time (s)Velocity Response (h=5%)506070

Displacement Response (h=5%)

30

3000

NS-S
EW-S
UD-S

80

080

123Period (s)2000

Sd (cm)

40

NS-S
EW-S
UD-S

Sa (cm/s²)

20

5

Sa-Sd curve (h=5%)

NS-S
EW-S
UD-S

60

4s

0

Sv (cm/s)

Acceleration Response (h=5%)

0 .5

Acc. (cm/s²)

Acc. (cm/s²)

Acc. (cm/s²)

Ground motion at ISKH01 (Suzu)

101s

1000

201.5s2s2.5s

000123Period (s)45002024/06/03 06:31:27 at ISKH01: KiK-net station, Intensity: 5.4123
Period (s)4501020
Sd (cm)

30

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600

Acceleration

2000

NS-S (peak: 486.9 cm/s²)

Acceleration Response (h=5%)
NS-S
EW-S
UD-S

0
1500-600
600

Sa (cm/s²)

EW-S (peak: -289.3 cm/s²)

0-600
600

1000

500

UD-S (peak: -354.1 cm/s²)00-6000100

10203040Time (s)Velocity Response (h=5%)

5060

70

Displacement Response (h=5%)

30

2000

NS-S
EW-S
UD-S80080

123Period (s)

4NS-S
EW-S
UD-S

5Sa-Sd curve (h=5%)0.5s

Acc. (cm/s²)

Acc. (cm/s²)

Acc. (cm/s²)

Ground motion at ISKH03 (Uchiura)

NS-S
EW-S
UD-S

1500
Sa (cm/s²)

60

Sd (cm)Sv (cm/s)

2040

1s

1000

101.5s

500

202s
2.5s

000

123
Period (s)4500123Period (s)450102030Sd (cm)2024/06/03 06:31:28 at ISKH03: KiK-net station, Intensity: 5.2

Response acceleration spectrum Sa and response periods
Colored Line: strong motion observation (Equivalent damping factor＝5％)

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Sa - Sd curve and response periods
Colored Line: strong motion observation(Equivalent damping factor＝15％)

Base shear coefficient CB＊(＊effective mass conversion)!! =1.5
1 + 10ℎ

SummaryBRI• The response acceleration (Sa) of the ISK002 (Shoin), ISKH03 (Uchiura), and theNorth-South (NS) components of ISKH01 (Suzu) showed large values in theperiod of 0.5 s or less.
• From the Sa-Sd curve assuming a 15% equivalent damping ratio, the Sa-Sd
shapes of this earthquake were smaller than past major earthquakes in Japan.

Acknowledgments
We used K-NET and KiK-net strong-motion data provided by
the National Research Institute for Earth Science and Disaster Resilience; NIED), Japan(https://www.doi.org/10.17598/NIED.0004)
We used strong motion data provided by NIED (K-NET and KiK-net), JMA, and RTRI for paststrong motion in Japan.
Sa-T and Sa-Sd were calculated using the View Wave by Kashima, BRI.
Figures were prepared using Generic Mapping Tools (GMT: Wessel and Smith, 1998).