Observations in Chronological order
Day 3, Oct. 9
Location 15, 133o18.2'E, 35o26.2'N: Abe-Hikona residential area
| Extensive liquefacation. Pile supported apartment suffered no structural damaged, but post liquefaction settlement of about 25 cm of surrounding soils caused sewage pipes to break and entrance staircases to be offset. Many one or two story family houses were tilted and had cracked walls. Almost all houses were assigned yellow "cards", meaning people can still remain in the house but should be careful. A green card means that the building suffered no or little damage, while a red card building has to be evacuated. The photos show how the retaining walls along a channel suffered damage due to liquefaction. A Large sinkhole caused by the main shock on friday the 6th had been repaired but the large aftershock on sunday evening caused the same sinkhole again. The doors in the gate were offset some 20 cm. An electric pole settled almost 3 meters (the 1st pole to the right of the pole in the center of the photo). |
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Location 16, 133o19.1E, 35o12.1'N: Zugesawa dam
| The accelerations were much lower than at the Kashoo dam, thus also here no damage was observed. The transverse acceleration at the base was 106 gals and the longitudinal was 153 gals. |