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Table 1 Eruption tremor episodes analyzed in this study. Tremor duration was estimated as the interval during which the envelope amplitude averaged over a 5-s interval was larger than the noise amplitude before the tremor onset

From: An approach to source characterization of tremor signals associated with eruptions and lahars

Date and time of tremor onset Duration (s) Source amplitude (m2/s) Cumulative source amplitude (m2) Cumulative source pressure (Pa m s)
Inharmonic tremor
 2010-05–28 13:46:53 28380 (5.3 ± 1.0) × 10−1 (3.71 ± 0.43) × 103 (1.19 ± 0.30) × 109
 2012–12–16 12:34:45 9345 (2.49 ± 0.46) × 10−1 (8.20 ± 0.12) × 102 (2.67 ± 0.57) × 108
 2012–12–16 15:10:05 24350 (3.45 ± 0.21) × 10−1 (1.84 ± 0.14) × 103 (5.0 ± 1.0) × 108
 2013–03–16 22:56:57 7620 (4.26 ± 0.59) × 10−1 (7.68 ± 0.90) × 102 (1.83 ± 0.35) × 108
 2013–07–14 11:46:32 3895 (2.81 ± 0.13) × 10−1 (5.6 ± 1.1) × 102 (1.08 ± 0.18) × 108
 2014–02–01 22:38:46 17795 (5.76 ± 0.78) × 10−1 (2.05 ± 0.29) × 103 (6.4 ± 1.4) × 108
Harmonic tremor
 2010–05–29 12:54:41 235 (9.44 ± 0.47) × 10−2 (1.16 ± 0.09) × 101 (2.66 ± 0.33) × 106
 2010–05–29 21:07:21 420 (1.96 ± 0.26) × 10−1 (2.61 ± 0.12) × 101 (5.15 ± 0.96) × 106
 2010–05–29 21:15:07 125 (5.70 ± 0.82) × 10−2 2.84 ± 0.45 (2.0 ± 1.0) × 105
 2010–05–29 23:51:24 260 (1.12 ± 0.13) × 10−1 (1.25 ± 0.14) × 101 (2.67 ± 0.48) × 106
 2012–12–17 03:45:42 690 (1.70 ± 0.14) × 10−1 (3.31 ± 0.44) × 101 (1.74 ± 0.36) × 106
 2012–12–17 05:36:10 2605 (1.55 ± 0.15) × 10−1 (1.63 ± 0.13) × 102 (2.27 ± 0.46) × 107
 2012–12–17 08:16:46 965 (1.76 ± 0.18) × 10−1 (1.04 ± 0.11) × 102 (1.23 ± 0.29) × 107
 2014–02–02 02:34:17 145 (1.06 ± 0.73) × 10−1 6.86 ± 0.82 (4.8 ± 1.7) × 105
 2014–02–02 12:24:28 510 (1.50 ± 0.89) × 10−1 (4.05 ± 0.43) × 101 (1.54 ± 0.30) × 106
 2014–02–02 21:55:24 875 (1.59 ± 0.40) × 10−1 (5.97 ± 0.40) × 101 (1.38 ± 0.23) × 107