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Table 3 Results of the correction applied to the OBTM data at the tsunami frequency (>2 hour−1). The results of the overall correction based on the analysis shown in Fig. 7 are also shown at the second line of each OBTM site. Temperature increase and decrease denotes total numbers of the rapid temperature increases and decreases that occurred during the entire observing periods. Numbers in brackets are standard deviations of the estimates. Reduction rates are defined as

From: Temperature correction and usefulness of ocean bottom pressure data from cabled seafloor observatories around Japan for analyses of tsunamis, ocean tides, and low-frequency geophysical phenomena

Site

Temperature

Regression coefficient

Lag

Uncorrected SD

Reduction rate

 

Increase

Decrease

(hPa/°C)

(min)

(hPa)

(%)

TM1

0

21

15.609 (6.120)

10.2 (3.4)

0.117 (0.031)

5.1

   

10.349 (3.225)

8.0 (0.9)

0.118 (0.014)

0.8

TM2

3

42

11.147 (6.356)

8.9 (4.8)

0.146 (0.053)

2.1

   

5.774 (2.119)

7.6 (1.4)

0.133 (0.020)

0.8

MPG1

10

469

25.352 (6.928)

8.9 (4.0)

0.102 (0.048)

6.9

   

21.057 (2.991)

9.5 (0.3)

0.098 (0.029)

2.0

MPG2

2037

4904

18.442 (4.114)

9.4 (2.4)

0.109 (0.092)

10.1

   

17.441 (1.320)

9.3 (0.3)

0.110 (0.015)

6.4

KPG1

29

441

10.381 (2.154)

11.2 (5.1)

0.081 (0.033)

3.7

   

9.033 (0.250)

10.1 (0.2)

0.084 (0.005)

1.2

KPG2

1

31

18.286 (4.172)

2.1 (5.4)

0.088 (0.027)

5.7

   

17.588 (1.075)

0.0 (0.1)

0.086 (0.007)

1.2

  1. SD denotes standard deviation.