Research Article
Field Detection of Microcracks to Define the Nucleation Stage of Earthquake Occurrence
Table 1
Catalog B-type Pulse 2011-03-03
2011-03-11.
| Number | Second | Hour | Type | Strength (mV) | Duration (ms) | Comment |
| |
3-March | 1 | 74089.15 | 20.58 | B-2 | −3.5 | 40 | P phase? | 2 | 76994.65 | 21.39 | B-3 | −5.5 | 30 | P phase | 3 | 77752.56 | 21.60 | B-1 | 2 | 25 | |
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4-March | 4 | 63758.70 | 17.71 | B-3 | 11.5 | 30 | | 5 | 64522.10 | 17.92 | B-2 | 5 | 40 | | 6 | 65485.30 | 18.19 | B-2 | −11.5 | 10 | | 7 | 65937.20 | 18.32 | B-2 | 12 | 10 | | 8 | 81148.30 | 22.54 | B-2 | −3.0 | 10 | P phase |
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6-March | |
Till 14:00 (no-data) | 8 | 50571.1 | 14.05 | B-1 | 2 | 30 | | 9 | 53094.25 | 14.75 | B-1 | 3.8 | 40 | | 10 | 53336.8 | 14.82 | B-1 | 16.0 | 40 | | 11 | 64179.30 | 17.83 | B-1 | 3.3 | 40 | Clear P phase | 12 | 65995.55 | 18.33 | B-2 | 6.5 | 14 | | 13 | 70869.25 | 19.69 | B-2 | 3.5 | 20 | | 14 | 75902.15 | 21.08 | B-2 | 9.5 | 25 | | 15 | 83206.30 | 23.11 | B-3 | −2.2 | 40 | | 16 | 84237.55 | 23.40 | B-2 | 8.3 | 25 |
Subevents |
| |
7-March | 16 | 16950.85 | 4.71 | B-2 | 2 | 15 | | 17 | 20103.65 | 5.58 | B-2 | 3.3 | 12 | | 18 | 64481.80 | 17.91 | B-2 | 2.1 | 13 | | 19 | 68579.95 | 19.05 | B-1 | 2.2 | 37 | | 20 | 69144.05 | 19.21 | B-3 | 4.2 | 40 | | 21 | 69559.45 | 19.32 | B-2 | 2.1 | 9 | | 22 | 79177.40 | 21.99 | B-3 | 7.9 | 45 | |
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8-March | 23 | 17343.05 | 4.82 | B-2 | 8.0 | 35 | P, S phase | 24 | 21232.45 | 5.90 | B-3 | 12.4 | 45 | P, S phase | 25 | 21512.30 | 5.98 | B-1 | 4.1 | 37 | HF. At 1st step | 26 | 26099.85 | 7.25 | B-2 | 2.1 | 4 | | 27 | 26871.50 | 7.46 | B-3 | 5.7 | 37 | | 28 | 31388.05 | 8.72 | B-1 | 7.0 | 45 | Subevent in coda | 29 | 33307.20 | 9.25 | B-1 | 4.1 | 60 | P, S phase? | 30 | 33624.30 | 9.34 | B-1 | 8.5 | 60 | | 31 | 39163.85 | 10.88 | B-1 | 5.1 | 43 | | 32 | 39727.80 | 11.04 | B-1 | 4 | 40 | | 33 | 42297.30 | 11.75 | B-2 | 2 | 7 | | 34 | 44458.00 | 12.35 | B-2 | 2 | 15 | | 35 | 75881.30 | 21.08 | B-2 | 2.2 | 8 | | 36 | 79821.30 | 22.17 | B-3 | 5.8 | 30 | | 37 | 80090.35 | 22.25 | B-3 | −3.8 | 45 | | 38 | 80203.15 | 22.28 | B-2 | 6.2 | 20 | | 39 | 82117.00 | 22.81 | B-3 | 11.5 | 50 | | 40 | 82234.60 | 22.84 | B-1 | 3 | 40 | | 41 | 82617.35 | 22.95 | B-3 | 5.8 | 40 | | 42 | 83904.35 | 23.31 | B-2 | 2.7 | 10 | | 43 | 83904.40 | 23.31 | B-2 | 5 | 10 | | 44 | 85307.20 | 23.7 | B-2 | 4.1 | 10 | | 45 | 85885.95 | 23.86 | B-2 | −11.7 | 25 | | 46 | 86122.75 | 23.92 | B-3 | −2.8 | 30 | P, S phase? | 47 | 86738.30 | 24.09 | B-2 | 2.2 | 10 | | 48 | 86953.40 | 24.15 | B-2 | 4.2 | 15 | | 49 | 87379.20 | 24.27 | B-2 | 2.1 | 10 | | 50 | 87590.00 | 24.33 | B-2 | 6.0 | 10 | | 51 | 89027.35 | 24.73 | B-1 | 5 | 45 | |
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9-March | 52 | 2493.70 | 0.69 | B-1 | 2.5 | 47 | | 53 | 3817.85 | 1.06 | B-2 | 3.7 | 33 | High freq.com at 1st step 1.5 kHz | 54 | 4109.35 | 1.14 | B-3 | 8.3 | 43 | | 55 | 5327.10 | 1.48 | B-3 | 6 | 44 | | 56 | 5374.60 | 1.49 | B-1 | 2.2 | 32 | | 57 | 6221.80 | 1.73 | B-3 | 2.1 | 40 | | 58 | 6272.40 | 1.74 | B-3 | 3.5 | 50 | Complex | 59 | 6454.95 | 1.79 | B-3 | 5.4 | 60 | | 60 | 6684.75 | 1.86 | B-3 | 8.9 | 30 | P, S phase? | 61 | 7091.50 | 1.97 | B-3 | 18.3 | 40 | P, S phase? | 62 | 8501.15 | 2.36 | B-1 | 3 | 30 | | 63 | 11404.10 | 3.17 | B-1 | 3.5 | 35 | P, S phase? | 64 | 12040.80 | 3.34 | B-1 | 3.5 | 40 | P, S phase? | 65 | 12185.25 | 3.38 | B-1 | 8.0 | 20 | | 66 | 12983.65 | 3.61 | B-1 | 7.5 | 50 | P, S phase? | 67 | 14067.05 | 3.91 | B-2 | 6.3 | 30 | P, S phase? | 68 | 14206.80 | 3.95 | B-1 | 5 | 40 | P, S phase? | 69 | 16891.85 | 4.69 | B-3 | 11.3 | 30 | P, S phase? | 70 | 16892.00 | 4.69 | B-2 | 4.1 | 10 | | 71 | 19113.05 | 5.31 | B-2 | 4.5 | 10 | P, S phase? | 72 | 19198.05 | 5.33 | B-1 | 3 | 35 | P, S phase? | 73 | 21171.70 | 5.88 | B-1 | 2 | 30 | | 74 | 21657.55 | 6.02 | B-1 | 3.5 | 40 | | 75 | 22136.65 | 6.15 | B-1 | 4 | 35 | | 76 | 26479.25 | 7.36 | B-1 | 3.5 | 35 | | 77 | 27832.15 | 7.73 | B-1 | 2.2 | 40 | | 78 | 29191.10 | 8.11 | B-1 | 3 | 30 | | 79 | 30824.20 | 8.56 | B-2 | 2.2 | 20 | | 80 | 31511.55 | 8.75 | B-2 | 2.2 | 10 | | 81 | 33641.20 | 9.34 | B-2 | 4.3 | 10 | | 82 | 33649.35 | 9.35 | B-1 | 2 | 35 | | 83 | 35323.25 | 9.81 | B-1 | 4 | 45 | | 84 | 37181.60 | 10.33 | B-2 | −2.1 | 10 | | 85 | 39193.76 | 10.89 | B-2 | 4 | 10 | | 86 | 42674.60 | 13.8 | B-2 | 4 | 40 | | 87 | 54068.55 | 15.02 | B-2 | 2 | 10 | | 88 | 55135.70 | 15.32 | B-1 | 11.3 | 40 | | 89 | 66156.10 | 18.38 | B-2 | −5.1 | 10 | | 90 | 66775.25 | 18.55 | B-2 | 5.1 | 30 | | 91 | 67365.35 | 18.43 | B-1 | 4 | 40 | | 92 | 67574.65 | 18.77 | B-2 | 3 | 27 | Complex | 93 | 67651.80 | 18.79 | B-2 | 2.8 | 10 | | 94 | 67766.85 | 18.82 | B-1 | 3.7 | 33 | | 95 | 67999.75 | 18.89 | B-1 | 3 | 30 | Most complex | 96 | 68063.10 | 18.91 | B-3 | 10.8 | 45 | | 97 | 68211.65 | 18.95 | B-2 | 5 | 15 | Most complex | 98 | 68801.6 | 19.11 | B-3 | 11.9 | 60 | | 99 | 69211.45 | 19.23 | B-1 | 3.5 | 35 | | 100 | 69769.60 | 19.38 | B-3 | −4.0 | 35 | | 101 | 70573.30 | 19.6 | B-1 | 3.1 | 35 | | 102 | 71162.05 | 19.77 | B-2 | 2.9 | 28 | Complex | 103 | 71496.80 | 19.86 | B-1 | 4.1 | 50 | Subevent | 104 | 71694.70 | 19.92 | B-2 | 3.5 | 10 | | 105 | 71939.50 | 19.98 | B-2 | 2.8 | 10 | | 106 | 72573.75 | 20.16 | B-3 | −4.2 | 25 | Complex | 107 | 72754.65 | 20.21 | B-3 | −16.0 | 40 | | 108 | 73382.65 | 20.38 | B-2 | 4 | 10 | | 109 | 73409.05 | 20.39 | B-2 | 2.2 | 8 | | 110 | 73619.15 | 20.45 | B-1 | 3 | 40 | Complex | 111 | 73893.35 | 20.53 | B-2 | 3.9 | 10 | | 112 | 74918.70 | 20.81 | B-3 | 9.2 | 35 | | 113 | 75750.80 | 21.04 | B-1 | −4.0 | 30 |
Subevent | 114 | 76353.05 | 21.21 | B-2 | 9.7 | 10 | Subevent | 115 | 76732.30 | 21.31 | B-2 | 3.9 | 10 | Subevent | 116 | 77958.25 | 21.66 | B-2 | 4.3 | 15 | | 117 | 78709.60 | 21.86 | B-3 | 10.5 | 40 | | 118 | 78908.15 | 21.92 | B-2 | −7.6 | 10 | Typical B-2 type | 119 | 79258.25 | 22.02 | B-3 | 2 | 33 | P? subevent? | 120 | 80042.45 | 22.23 | B-2 | 2.1 | 9 | P? subevent? | 121 | 82451.20 | 22.9 | B-2 | 4 | 10 | | 122 | 82632.30 | 22.95 | B-3 | 6.5 | 30 | P? subevent? | 123 | 83138.70 | 23.09 | B-2 | −10.1 | 10 | | 124 | 84541.40 | 23.48 | B-3 | 11.0 | 30 | | 125 | 84795.30 | 23.55 | B-3 | 6.5 | 35 | | 126 | 84841.35 | 23.57 | B-1 | 4 | 30 | Subevent | 127 | 85341.90 | 23.71 | B-1 | 4.4 | 34 | | 128 | 85352.70 | 23.71 | B-2 | 6 | 10 | | 129 | 85374.55 | 23.72 | B-1 | 3 | 45 | | 130 | 87677.00 | 24.35 | B-1 | 5 | 38 | P phase? | 131 | 88837.15 | 24.68 | B-2 | 3.1 | 10 | |
| |
10-March | 132 | 3800.15 | 1.06 | B-2 | 4.1 | 20 | P phase? | 133 | 4262.10 | 1.18 | B-2 | 2.2 | 22 | P phase? | 134 | 5869.60 | 1.63 | B-2 | 3.7 | 15 | Subevent | 135 | 7020.15 | 1.95 | B-2 | 2.5 | 15 | | 136 | 7870.35 | 2.19 | B-2 | 2 | 10 | | 137 | 8116.80 | 2.25 | B-2 | 2 | 10 | | 138 | 17156.75 | 4.77 | B-3 | 12.0 | 40 | | 139 | 24115.35 | 6.70 | B-1 | 5 | 50 | | 140 | 24348.45 | 6.76 | B-1 | 5.5 | 37 | | 141 | 75609.20 | 21.00 | B-2 | 10.5 | 35 | P phase? | 142 | 84056.55 | 23.35 | B-2 | 2 | 15 | |
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11-March | 143 | 13276.85 | 3.69 | B-1 | 3.5 | 45 | | 144 | 13400.30 | 3.72 | B-1 | 2 | 35 | | 145 | 15506.5 | 4.31 | B-3 | 4.2 | 45 | P, S phase | 146 | 18325.85 | 5.09 | B-2 | 2.2 | 20 | P, S phase | 147 | 21801.45 | 6.06 | B-2 | 4 | 20 | P, S phase | 148 | 22395.30 | 6.22 | B-2 | 7.0 | 10 | | 149 | 22503.65 | 6.25 | B-2 | 8.0 | 10 | | 150 | 22628.50 | 6.29 | B-2 | 3 | 10 | | 151 | 22891.70 | 6.36 | B-2 | −7.0 | 15 | | 152 | 23432.95 | 6.51 | B-2 | 5.5 | 10 | P-S 40 ms | 153 | 23485.85 | 6.52 | B-2 | −11.0 | 35 | | 154 | 25421.75 | 7.06 | B-2 | 4 | 15 | P, S phase | 155 | 25658.20 | 7.13 | B-1 | 12.5 | 35 | | 156 | 27287.35 | 7.58 | B-1 | 2 | 35 | | 157 | 27319.50 | 7.59 | B-2 | −8.5 | 10 | | 158 | 27385.00 | 7.61 | B-1 | 2 | 35 | P, S phase | 159 | 28639.15 | 7.96 | B-1 | 3.2 | 36 | | 160 | 34295.7 | 9.53 | B-2 | 2.6 | 20 | | 161 | 34564.55 | 9.60 | B-2 | 4.1 | 10 | P, S phase | 162 | 36804.60 | 10.22 | B-2 | 2.5 | 10 | | 163 | 45290.80 | 12.58 | B-1 | 2 | 35 | P, S phase |
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