Can somebody judge how many towers and suspensions went isolated/safe mode by the first event of (2024-01-01 16:06    石川県能登地方    M5.7 ) ?

Actually, the next one of (2024-01-01 16:10    石川県能登地方    M7.6) could be more dangerous. If many could go to isolated/safe mode by the 1st one, we can expect these towers and suspensions could be safer. 

I checked the KAGRA seismometers (Trillium120).

For the largest earthquake, the signal was saturated.

I also checked the accelerometers signal.

• some ACCs (EXC/EYC/IYC chamber, Tx of Y-PCal, PSL periscope/portable) are not working.
• ACCs on the PSL tables are saturated, probably due to their amplifiers' gain being larger than others.
• Other ACCs show 0.1~0.2 m/s2 signal

JST    Location    Dep    Distance
2024-01-02 11:19    石川県西方沖    10    117
2024-01-02 11:05    石川県能登地方    10    110
2024-01-02 10:17    石川県能登地方    10    102
2024-01-02 09:14    石川県能登地方    30    109
2024-01-02 07:37    石川県能登地方    10    120
2024-01-02 07:27    石川県能登地方    10    112
2024-01-02 07:13    石川県能登地方    20    104
2024-01-02 06:53    新潟県上中越沖    10    134
2024-01-02 06:34    石川県能登地方    10    112
2024-01-02 04:42    能登半島沖    10    112
2024-01-02 04:27    能登半島沖    10    98
2024-01-02 04:05    能登半島沖    20    121
2024-01-02 04:02    石川県能登地方    10    108
2024-01-02 03:29    石川県能登地方    0    98
2024-01-02 02:52    石川県能登地方    10    98
2024-01-02 02:48    佐渡付近    10    170
2024-01-02 02:33    新潟県上中越沖    10    132
2024-01-02 01:43    能登半島沖    10    131
2024-01-02 01:42    佐渡付近    10    156
2024-01-02 00:08    石川県能登地方    10    120
 

JST                          Location    Magnitude    Dep    Distance
2024-01-03 22:09    佐渡付近    4    10    152
2024-01-03 19:49    新潟県上中越沖    4.1    10    132
2024-01-03 19:42    石川県能登地方    4    10    102
2024-01-03 18:48    石川県能登地方    4.8    10    108
2024-01-03 17:15    佐渡付近    4    10    145
2024-01-03 16:08    石川県能登地方    4.2    10    115
2024-01-03 13:44    能登半島沖    4.1    10    131
2024-01-03 13:04    佐渡付近    4.1    10    143
2024-01-03 12:54    新潟県上中越沖    4.9    10    134
2024-01-03 12:48    佐渡付近    4.1    10    169
2024-01-03 12:37    能登半島沖    4.2    10    107
2024-01-03 11:48    石川県能登地方    4.2    10    120
2024-01-03 10:54    石川県能登地方    5.6    10    115
2024-01-03 10:36    佐渡付近    4    10    173
2024-01-03 08:34    石川県能登地方    4    10    112
2024-01-03 07:51    石川県西方沖    4    10    104
2024-01-03 06:32    石川県能登地方    4.5    10    98
2024-01-03 05:54    佐渡付近    4.2    10    157
2024-01-03 02:30    石川県能登地方    4.4    10    120
2024-01-03 02:21    石川県能登地方    4.9    10    120
2024-01-02 21:13    石川県能登地方    4.3    10    104
2024-01-02 18:50    佐渡付近    4.1    10    145
2024-01-02 18:29    石川県能登地方    4.3    10    120
2024-01-02 18:20    石垣島近海    4.4    70    1788
2024-01-02 17:56    能登半島沖    4.2    10    112
2024-01-02 17:52    佐渡付近    4.2    10    147
2024-01-02 17:13    能登半島沖    4.6    10    98
2024-01-02 15:57    石川県能登地方    4.5    10    102
2024-01-02 15:02    佐渡付近    4.2    10    160
2024-01-02 14:01    能登半島沖    4.3    10    118
2024-01-02 11:19    石川県西方沖    4.1    10    117
2024-01-02 11:05    石川県能登地方    4.1    10    110
2024-01-02 10:17    石川県能登地方    5.6    10    102
2024-01-02 09:14    石川県能登地方    4.7    30    109
2024-01-02 07:37    石川県能登地方    4.3    10    120
2024-01-02 07:27    石川県能登地方    4.3    10    112
2024-01-02 07:13    石川県能登地方    4.7    20    104
2024-01-02 06:53    新潟県上中越沖    4.2    10    134
2024-01-02 06:34    石川県能登地方    4.2    10    112
2024-01-02 04:42    能登半島沖    4.9    10    112
2024-01-02 04:27    能登半島沖    4.7    10    98
2024-01-02 04:05    能登半島沖    4    20    121
2024-01-02 04:02    石川県能登地方    4    10    108
2024-01-02 03:29    石川県能登地方    4    0    98
2024-01-02 02:52    石川県能登地方    4.2    10    98
2024-01-02 02:48    佐渡付近    4.3    10    170
2024-01-02 02:33    新潟県上中越沖    4.6    10    132
2024-01-02 01:43    能登半島沖    4.4    10    131
2024-01-02 01:42    佐渡付近    4.2    10    156
2024-01-02 00:08    石川県能登地方    4.5    10    120
 

I try to calculate from the ACCs signal to the seismic intensity (震度)  based on its definition (https://www.data.jma.go.jp/eqev/data/kyoshin/kaisetsu/calc_sindo.html).
However, it is impossible because it requires 3-axial vector data but our ACCS are 1-axial ones.

All channels of the INF01 at Mozumi.
Note that the accelerometer signal is peak-hold value.

The largest peak ~ 200 Gal = 2 m/s2 is almost the same to the underground ACC data.

I summarized the ACC data as a CSV file.

https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=15545

I evaluated the Shindo intensity (震度) for the M7.6 Earthquake,  by the ACC signals even though they are 1-axial.

ref: https://www.data.jma.go.jp/eqev/data/kyoshin/kaisetsu/calc_sindo.html

By assuming the vibration is the same for each axis, the vector-sum intensity is √3 times the Z-direction, and the expected Shindo was 4 or 5-.

From the JMA page (https://www.data.jma.go.jp/multi/quake/quake_detail.html?eventID=20240101162429&lang=jp), the Shindo around KAGRA were 4 or 5-.
It is consistent to my analysis.

I found my mistake in the calculation to expect the total vibration from the Z-direction data.

Because Shindo-intensity is the value taken logarithmic for (filled) acceleration, multiplying √3 should be inside the log10, and the final correction for the Shindo-intensity is adding 2*log10(√3) = 0.48.

Finally, the expected Shindo became 3.

The ACC data that was excited by M6.8 around Noto on May 5th seems to be ~0.03 m/s/s around peaks. This is 1/8 smaller than that by M7.6 on Jan 1st.