Damage Survey from the2024 Noto Peninsula
Earthquakever.01 (2024/02/01)
Silvana Montoya-Noguera
Invited researcher
Disaster Prevention Research InstituteKyoto UniversityJapan

Associate Professor
School of Applied Sciences and Engineering
Universidad EAFIT
Colombia

Survey schedule
January 28th - 29th , 2024
Uchinada → Nanao
Wajima → Anamizu → Wajima Monzen
Wajima3 seismic tests: ISK009 (1 station), Uchinada (1 station),and ISK003 (microtremor array)

Research members

WajimaMonzenHiroyuki Goto, Nakatsuji Ayaka, Huang
Dongliang, Silvana Montoya-Noguera

Anamizu
Nanao

PurposeUnderstanding geotechnical failure andground motions
UchinadaThis report partially covers damage due toground failure with a focus on liquefaction
and some damage to buildings. (This is not atextensive report of all damages in the area)Uchinada Liquefaction-induced
damage: Lateral spreading(about 2.7 Ha)
 Ground upheave2

 Ground settlement3 Sand ejecta

1

LateralSpreading
NW - SE

987

N Photo Number

46

Photo Direction

5
Google EarthUchinada
1. Sinking of Traffic Light and upheave of side walk

BeforeStreet View,Google Maps

AfterUchinada
2. Lateral displacement (NW to SE) and vertical relative settlement

BeforeStreet View,
Google Maps

After

Uchinada
3. Tensile cracks, settlement and lateral spreading

BeforeStreet View, Google Maps

After

Uchinada
4. Sand ejecta, utility pole rotation and structures’ settlement

BeforeStreet View,
Google Maps

After

Uchinada
5. Sand ejecta, utility pole sinking and ground upheave

BeforeStreet View,
Google Maps

After

Uchinada
6. Sand ejecta, relative settlement and ground upheave

BeforeAfter
Street View, Google Maps

Uchinada
7. Sand ejecta, horizontal displacement and ground upheave

BeforeStreet View, Google Maps

After

Uchinada
8. Sand ejecta, rotation, and ground upheave

BeforeStreet View, Google Maps

After

Uchinada
9. Vertical settlement

BeforeStreet View,Google Maps

After

Nanao Liquefaction-induced damages (1-3, 8):

 Manholes upheave
 Sand ejecta3 Ground settlement
 Damage to structures:
 Collapsed traditional wood house (4)1 Collapsed temple entrance gate (5)24 Collapsed first floor (6)5 Fallen facade of steel structure (7)876N Case Number

Google EarthNanao
1. Liquefaction-induced Damage surrounding the “ Food FestivalMarket”

Manholes and pipeline uplift

Relative settlement

Ground subsidenceNanao
1. Liquefaction-induced Damage surrounding the “ Food Festival Market”

Ground subsidence and sand ejecta

Ground subsidence

Ground subsidenceNanao2. Liquefaction-induced Damage at the Quay and the aquatic stage

Ground subsidence

Tilted quay, sand ejecta
and ground subsidence

Sand ejecta andground subsidence

Subsidence and curved quay

Nanao3. Ground subsidence around bridge

Cracks in bridge stairs

Ramp built to access bridge

Ground subsidence

Cracks and ground subsidence atparking lot near bridge

Nanao4. Collapsed traditional wood house

Timber structure and earthen plaster

https://www.tutikabe.net/en/

BeforeStreet View,
Google Maps

After

Nanao5. Collapsed entrance gate

BeforeStreet View,
Google Maps

After

Nanao6. Collapsed of firstfloor of wood house

Vertical andhorizontal
asymmetry

BeforeAfter
Street View,
Google Maps

Nanao6. Collapsed of firstfloor of wood house

First “Weak floor”

BeforeAfter
Street View, Google Maps

Nanao7. Fallen facade of steel structure

BeforeStreet View,
Google Maps

After

NanaoRC buildings with no visible damage

Nanao
8. Liquefaction evidence near damaged and collapsed houses

Pole settlement and sand ejecta

Sand ejecta

Wajima City Center Many buildings were damaged or collapsed in Kawaicho, Wajima City (path in yellow).
 Ground deformation with compression and cracks
in road in N-S and E-W direction.
 Liquefaction evidence only in parks, parking lots,
and uplift of buried pipe and manholes.
 No evidence of liquefaction-induced failure onstructures.
 A fire extended in a large area of Morning market about 200 buildings destroyed and approx. 1.7 HaHigh compressive stresses

Google EarthWajima
1. First floor collapsed

BeforeStreet View,
Google Maps

After

Wajima
2. First floor tilted or collapsed

BeforeStreet View,
Google Maps

After

Wajima
3. First floor collapsed

BeforeStreet View,
Google Maps

After

Wajima
4. First floor collapsed

BeforeStreet View,
Google Maps

After

Wajima
5. First floor collapsed

BeforeStreet View,
Google Maps

After

Wajima
6. Liquefaction evidence: sand ejecta, ground cracks and manholes upliftWajima
6. Liquefaction evidence: manholes uplift and settlement

Wajima
7. Collapsed seven-story building (toppled)

BeforeStreet View,
Google Maps

After

Wajima
8. Fire after earthquake

Wajima
9. Houses collapsed due to seismic
landslide

Street View,
Google Maps

BeforeAfterAnamizu Two K-NET stations: ISK005 Anamizu (Soft site) andISK015 Omachi (Medium stiff site) ISK005:
 Bank and ground deformations are observed
around the station, but it cannot be determined
whether this is due to liquefaction.
 Water pipeline broke in the street.
 Other houses and structures damage in the town.

12Google EarthAnamizu
1. House tilted and settled near ISK005
ISK005 Anamizu

Anamizu
2. Building tilted

BeforeStreet View,
Google Maps

After

Wajima Monzen
 Many collapsed and damaged wood houses.
 Dry port
 Coast uplift

123

Google EarthWajima Monzen
1. Collapsed first floor

BeforeAfter

Wajima Monzen
2. Tilted houses

BeforeStreet View,
Google Maps

After

Wajima Monzen
3. Dry port andCoast uplift

BeforeStreet View,
Google Maps

After

Wajima Monzen
3. Coast uplift

BeforeStreet View,
Google Maps

After

Summary of reconnaisance survey
 Liquefaction-induced damage particularly observed in Uchinada, mainly lateral spreading ina large area. The extend is currenty unknown.
 Areas with significant building damage were observed particularly in Wajima
city center, Wajima Monzen, and Uchinada. But also damaged observed in
Anamizu and Nanao Cracks, settlement and uplift were visible on the road surface.
 Sand ejecta, sinking poles and manholes uplift evidence liquefaction.
 However, the causal relationship between building damage andliquefaction is currently unknown.
 K-Net and JMA stations visited were in good conditions but significant damage wasobserved in their surrounding.