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 |