I checked the room temperature in the mine.
https://gwdet.icrr.u-tokyo.ac.jp/~controls/slowmonitor/RT/
No serious damage was not found by eye.
some comments:
- Pt thermisters (1~4) in the PSL room got higher at the EQ time and backed in the midnight (0:00 JST)
- The temperature at EXC_1F was increased in the a.m. of Jan.1, but it should not be due to the EQ.
- The temperature at EYV was increased on Dec. 31 and backed on Jan. 1. Relations with the EQ are unclear.
