Seismik Refraksi_Metode Hagiwara
20
10 November 2014 raktikum Seismik Refraksi Metode Hagiwara Universitas Gadjah Mada GEOFISIKA
Transcript of Seismik Refraksi_Metode Hagiwara
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10 November 2014raktikum Seismik
Refraksi
Metode Hagiwara
Universitas Gadjah MadaGEOFISIKA
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Praktikum Seismik Refraksi Metode Hagiwara
Data
Tugas 1
X (m) forward reverse
12.5 6 76.5
25 12.5 71
37.5 19 65.5
50 25 59
75 37 52
100 42.5 45.5
125 48.5 37.5
150 53 30.5
175 57 25
200 61.5 19.5225 66 17
250 71 12.5
275 76.5 6
Tugas 2
x(m) 2,5 82,5 162,5 242,5
0 7,7 126,4 192,2 259,5
5 7,7 116,7 182,4 249,910 23,1 107,5 173,2 240,7
15 38,5 96,2 162,5 230
20 53,8 87,3 153,6 221,1
25 57,3 81,3 147,6 215,1
30 63,8 80,1 146,4 213,9
35 72,1 80,5 146,8 214,3
40 80,1 78 144,3 211,8
45 86,4 75,5 141,8 209,3
50 93 69,1 135,5 203
55 94,9 62,6 128,9 196,4
60 98,3 58,2 124,5 192
65 103,3 53,8 121,5 189
70 109,6 38,5 119 186,5
75 115,7 23,1 114,7 182,2
80 120,3 7,7 107,6 175,1
85 121,6 7,7 101,3 168,8
90 125,3 23,1 93,4 161,4
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95 124,2 38,5 85,6 153,5
100 128,2 44,1 81,5 149,5
105 135,7 51,6 82,2 150,1
110 143,6 60,1 79,3 147,2
115 148,9 65,3 73,8 141,7
120 152,3 68,7 67,4 135,4
125 154,4 70,8 60,5 128,4
130 156,3 72,7 53,1 121
135 157 73,4 44,7 112,6
140 156,4 72,8 36 104
145 160,9 77,3 31,5 99,5
150 167,6 84 29,6 97,6
155 174 90,4 23,1 95160 182,7 99,1 7,7 96,1
165 190,5 106,9 7,7 92,3
170 193,8 110,3 23,1 86,7
175 199,4 115,9 38,5 83,8
180 204,2 120,7 44,1 79,4
185 211,1 127,5 51 80,7
190 220,1 136,7 60,4 79,5
195 227,7 144,2 68 77,6
200 234,8 151,4 75,2 72,5
205 239,1 155,7 79,4 63,3
210 238,7 155,4 79,1 56
215 240,4 157,1 80,8 49,4
220 243 159,6 83,3 42,4
225 244,4 161 84,8 35,1
230 246,2 162,9 86,6 28,3
235 248,7 165,3 89 22,2
240 252,4 169 92,8 7,7245 256,8 173,4 97,2 7,7
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Praktikum Seismik Refraksi Metode Hagiwara
Tugas 3
Shot 2.5 m 34.2 m 65.8 m 97.5 m Topo
(m)X (m) TT (ms) TT (ms) TT (ms) TT (ms)
0 7.2 53.9 72.4 106.5 100
5 7.2 49.9 68.3 102.4 100
10 22 43 61.5 95.6 99
15 33.4 37.1 55.5 89.6 98.3
20 37.8 33.3 51.7 85.8 98.4
25 42.4 26.7 48.2 82.3 98.6
30 48.1 12.1 45.7 79.8 99.2
35 52.7 2.4 42.1 76.2 99.4
40 54.3 17.1 35.6 69.7 98.5
45 56.3 28.7 29.4 63.5 97.8
50 58.5 30.9 23.4 57.6 97.155 62.1 34.5 18.9 53 96.9
60 64.9 37.3 13.6 47.7 96.4
65 69.8 42.1 2.4 44.4 96.7
70 73.4 45.7 12.1 39.8 96.5
75 79.7 52.1 18.9 38 97.4
80 86.4 58.8 25.6 36.5 98.3
85 91.6 64 30.7 33.5 98.7
90 97.8 70.2 36.9 21.9 99.5
95 103.2 75.6 42.3 7.3 99.9
100 105.7 78.1 44.9 7.3 99.4
Langkah Kerja
Tugas 1
X (m) forward reverse TAP TBP TAB TP T'AP V1 V2 Hp
12.5 6 76.5 25.90825 76.5 76.572 25.835 12.990 2932.974 4278.99 -27.5875
25 12.5 71 28.2995 71 76.572 22.727 16.935 2932.974 4278.99 -24.268
37.5 19 65.5 30.69075 65.5 76.572 19.618 20.881 2932.974 4278.99 -20.9484
50 25 59 33.082 59 76.572 15.509 25.327 2932.974 4278.99 -16.5611
75 37 52 37 52 76.572 12.427 30.786 2932.974 4278.99 -13.2702
100 42.5 45.5 42.5 45.5 76.572 11.427 36.786 2932.974 4278.99 -12.2024
125 48.5 37.5 48.5 37.5 76.572 9.4276 43.786 2932.974 4278.99 -10.0668
150 53 30.5 53 30.5 76.572 6.9276 49.536 2932.974 4278.99 -7.3973
175 57 25 57 25 76.572 5.4276 54.286 2932.974 4278.99 -5.7956
200 61.5 19.5 61.5 19.5 76.572 4.4276 59.286 2932.974 4278.99 -4.72781
225 66 17 66 17 76.572 6.4276 62.786 2932.974 4278.99 -6.8634
250 71 12.5 71 7.254 76.572 1.6816 70.159 2932.974 4278.99 -1.79563
275 76.5 6 76.5 0.5165 76.572 0.4441 76.277 2932.974 4278.99 -0.47424
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Praktikum Seismik Refraksi Metode Hagiwara
Equation Tugas 1 Velocity Tugas 1 Source to Source Time Tugas1
Direct Forward y = 0.4951x - 0.0946 V1 Forward 2019.794 Forward 78.51575
Refract Forward y = 0.1913x + 23.517 V1 Reverse 3846.154 Reverse 74.629
Direct Reverse y = -0.26x + 77.5 V1 rata-rata 2932.974 Average 76.572375
Refract Reverse y = -0.2695x + 74.629 V2 4278.99
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
12.5 25 37.5 50 75 100 125 150 175 200 225 250 275
K e d a l a m a n ( m
)
Jarak (m)
Permodelan Lapisan Tugas 1
Kedalaman vs Jarak
Lapisan 2 Lapisan 1
y = 0.4951x + 0.0946
y = 0.1913x + 23.517
y = -0.26x + 77.5
y = -0.2695x + 74.629
0
20
40
60
80
100
0 50 100 150 200 250 300
T r a v e l T i m e ( m s )
Distance (m)
Grafik Tugas 1
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.2337x + 12.503
0
10
20
30
40
50
60
70
80
90
0 50 100 150 200 250 300
T ' A P ( m s )
X (m)
X vs T'AP
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Praktikum Seismik Refraksi Metode Hagiwara
Tugas 2
Pengolahan Data SP1 dan SP4
x(m) 2.5 242.5 TAP TBP TAB TP T'AP V1 V2 Hp
0 7.7 259.5 41.3 259.5 252.658 48.1413 17.22931 335.0683 1091.346 -7.67579
5 7.7 249.9 45.8415 249.9 252.658 43.0828 24.30006 335.0683 1091.346 -6.86925
10 23.1 240.7 50.383 240.7 252.658 38.4243 31.17081 335.0683 1091.346 -6.12648
15 38.5 230 54.9245 230 252.658 32.2658 38.79156 335.0683 1091.346 -5.14456
20 53.8 221.1 59.466 221.1 252.658 27.9073 45.51231 335.0683 1091.346 -4.44962
25 57.3 215.1 57.3 215.1 252.658 19.7413 47.42931 335.0683 1091.346 -3.14762
30 63.8 213.9 63.8 213.9 252.658 25.0413 51.27931 335.0683 1091.346 -3.99266
35 72.1 214.3 72.1 214.3 252.658 33.7413 55.22931 335.0683 1091.346 -5.37981
40 80.1 211.8 80.1 211.8 252.658 39.2413 60.47931 335.0683 1091.346 -6.25675
45 86.4 209.3 86.4 209.3 252.658 43.0413 64.87931 335.0683 1091.346 -6.86263
50 93 203 93 203 252.658 43.3413 71.32931 335.0683 1091.346 -6.91046
55 94.9 196.4 94.9 196.4 252.658 38.6413 75.57931 335.0683 1091.346 -6.16108
60 98.3 192 98.3 192 252.658 37.6413 79.47931 335.0683 1091.346 -6.00164
65 103.3 189 103.3 189 252.658 39.6413 83.47931 335.0683 1091.346 -6.32052
70 109.6 186.5 109.6 186.5 252.658 43.4413 87.87931 335.0683 1091.346 -6.92641
75 115.7 182.2 115.7 182.2 252.658 45.2413 93.07931 335.0683 1091.346 -7.2134
80 120.3 175.1 120.3 175.1 252.658 42.7413 98.92931 335.0683 1091.346 -6.8148
85 121.6 168.8 121.6 168.8 252.658 37.74138 102.7293 335.0683 1091.346 -6.01758
90 125.3 161.4 125.3 161.4 252.658 34.0413 108.2793 335.0683 1091.346 -5.4276595 124.2 153.5 124.2 153.5 252.658 25.0413 111.6793 335.0683 1091.346 -3.99266
100 128.2 149.5 128.2 149.5 252.658 25.0413 115.6793 335.0683 1091.346 -3.99266
105 135.7 150.1 135.7 150.1 252.658 33.1413 119.1293 335.0683 1091.346 -5.28415
110 143.6 147.2 143.6 147.2 252.658 38.1413 124.5293 335.0683 1091.346 -6.08136
115 148.9 141.7 148.9 141.7 252.658 37.9413 129.9293 335.0683 1091.346 -6.04947
120 152.3 135.4 152.3 135.4 252.658 35.0413 134.7793 335.0683 1091.346 -5.58709
125 154.4 128.4 154.4 128.4 252.658 30.1413 139.3293 335.0683 1091.346 -4.80582
130 156.3 121 156.3 121 252.658 24.6413 143.9793 335.0683 1091.346 -3.92888
135 157 112.6 157 112.6 252.658 16.9413 148.5293 335.0683 1091.346 -2.70118140 156.4 104 156.4 104 252.658 7.74137 152.5293 335.0683 1091.346 -1.2343
145 160.9 99.5 160.9 99.5 252.658 7.74137 157.0293 335.0683 1091.346 -1.2343
150 167.6 97.6 167.6 97.6 252.658 12.5413 161.3293 335.0683 1091.346 -1.99963
155 174 95 174 95 252.658 16.3413 165.8293 335.0683 1091.346 -2.60551
160 182.7 96.1 182.7 96.1 252.658 26.1413 169.6293 335.0683 1091.346 -4.16805
165 190.5 92.3 190.5 92.3 252.658 30.1413 175.4293 335.0683 1091.346 -4.80582
170 193.8 86.7 193.8 86.7 252.658 27.8413 179.8793 335.0683 1091.346 -4.4391
175 199.4 83.8 199.4 83.8 252.658 30.5413 184.1293 335.0683 1091.346 -4.8696
180 204.2 79.4 204.2 79.4 252.658 30.9413 188.7293 335.0683 1091.346 -4.93337
185 211.1 80.7 211.1 80.7 252.658 39.1413 191.5293 335.0683 1091.346 -6.2408
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Praktikum Seismik Refraksi Metode Hagiwara
190 220.1 79.5 220.1 79.5 252.658 46.9413 196.6293 335.0683 1091.346 -7.48446
195 227.7 77.6 227.7 77.6 252.658 52.6413 201.3793 335.0683 1091.346 -8.39328
200 234.8 72.5 234.8 72.5 252.658 54.6413 207.4793 335.0683 1091.346 -8.71216
205 239.1 63.3 239.1 63.3 252.658 49.7413 214.2293 335.0683 1091.346 -7.93089
210 238.7 56 238.7 56 252.658 42.0413 217.6793 335.0683 1091.346 -6.70319
215 240.4 49.4 240.4 49.4 252.658 37.1413 221.8293 335.0683 1091.346 -5.92192
220 243 42.4 243 42.4 252.658 32.7413 226.6293 335.0683 1091.346 -5.22037
225 244.4 35.1 244.4 35.1 252.658 26.8413 230.9793 335.0683 1091.346 -4.27966
230 246.2 28.3 246.2 28.3 252.658 21.8413 235.2793 335.0683 1091.346 -3.48245
235 248.7 22.2 248.7 28.413 252.658 24.4543 236.4728 335.0683 1091.346 -3.89907
240 252.4 7.7 252.4 23.782 252.658 23.5233 240.6383 335.0683 1091.346 -3.75063
245 256.8 7.7 256.8 19.151 252.658 23.2923 245.1538 335.0683 1091.346 -3.7138
Equation SP1 & SP4 Velocity SP1 & SP4 Source to Source Time SP1 & SP4
Direct Forward y = 3.074x - 7.65 V1 Forward 325.309044 Forward 261.56275Refract Forward y = 0.9083x + 41.3 V1 Reverse 344.827586 Reverse 243.7545
Direct Reverse y = -2.9x + 703.7 V1 rata-rata 335.068315 Average 252.658625
Refract Reverse y = -0.9262x + 246.07 V2 1091.34563
y = 3.074x - 7.65
y = 0.9083x + 41.3
y = -2.9x + 703.7
y = -0.9262x + 246.07
0
50
100
150
200
250
300
0 50 100 150 200 250 300
T r a v e l T i m e ( m s )
Distance (m)
Grafik Hubungan SP1 & SP4
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.9163x + 23.854
0
50
100
150
200
250
300
0 50 100 150 200 250 300
T ' A P ( m s )
X (m)
X vs T'AP
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Praktikum Seismik Refraksi Metode Hagiwara
Pengolahan Data SP2 dan SP3
x(m) 82.5 162.5 TAP TBP TAB TP T'AP V1 V2 Hp
85 7.7 101.3 36.275 101.3 100.5014 37.07363 17.73819 324.6753 1070.091 -5.73474
90 23.1 93.4 40.149 93.4 100.5014 33.04763 23.62519 324.6753 1070.091 -5.11198
95 38.5 85.6 44.023 85.6 100.5014 29.12163 29.46219 324.6753 1070.091 -4.50468
100 44.1 81.5 44.1 81.5 100.5014 25.09863 31.55069 324.6753 1070.091 -3.88238
105 51.6 82.2 51.6 82.2 100.5014 33.29863 34.95069 324.6753 1070.091 -5.1508
110 60.1 79.3 60.1 79.3 100.5014 38.89863 40.65069 324.6753 1070.091 -6.01704
115 65.3 73.8 65.3 73.8 100.5014 38.59863 46.00069 324.6753 1070.091 -5.97063
120 68.7 67.4 68.7 67.4 100.5014 35.59863 50.90069 324.6753 1070.091 -5.50658
125 70.8 60.5 70.8 60.5 100.5014 30.79863 55.40069 324.6753 1070.091 -4.76409
130 72.7 53.1 72.7 53.1 100.5014 25.29863 60.05069 324.6753 1070.091 -3.91332
135 73.4 44.7 73.4 44.7 100.5014 17.59863 64.60069 324.6753 1070.091 -2.72225
140 72.8 36 72.8 36 100.5014 8.298625 68.65069 324.6753 1070.091 -1.28367
145 77.3 31.5 77.3 31.5 100.5014 8.298625 73.15069 324.6753 1070.091 -1.28367
150 84 29.6 84 29.6 100.5014 13.09863 77.45069 324.6753 1070.091 -2.02616
155 90.4 23.1 90.4 23.8505 100.5014 13.74913 83.52544 324.6753 1070.091 -2.12679
160 99.1 7.7 99.1 18.276 100.5014 16.87463 90.66269 324.6753 1070.091 -2.61025
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240
K e d a l a m a n ( m )
Jarak (m)
Permodelan Lapisan SP1 & SP4
Kedalaman vs Jarak
Lapisan 2 Lapisan 1
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Praktikum Seismik Refraksi Metode Hagiwara
Equation SP2 & SP3 Velocity SP2 & SP3 Source to Source Time SP2 & SP3
Direct Forward y = 3.08x - 254.1 V1 Forward 324.675325 Forward 96.322
Refract Forward y = 0.7748x + 29.583 V1 Reverse 324.675325 Reverse 104.68075
Direct Reverse y = -3.08x + 500.5 V1 rata-rata 324.675325 Average 100.501375
Refract Reverse y = -1.1149x + 196.66 V2 1070.09096
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160
K e d a l a m a n ( m )
Jarak (m)
Permodelan Lapisan SP2 & SP3
Kedalaman vs Jarak
Lapisan 2 Lapisan 1
y = 3.08x - 254.1
y = 0.7748x - 29.583
y = -3.08x + 500.5
y = -1.1149x + 196.66
0
20
40
60
80
100
120
80 100 120 140 160 180
T r a v e l T i m e ( m s )
Distance (m)
Grafik Hubungan SP2 & SP3
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.9345x - 61.447
0
20
40
60
80
100
80 100 120 140 160 180
T ' A P ( m s )
X (m)
X vs T'AP
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Praktikum Seismik Refraksi Metode Hagiwara
Hasil Korelasi
Dari korelasi SP1 & SP 4 dengan SP2 dan SP3 diperoleh hasil seperti gambar diatas. Hasil gamabr diatas kurang berkorelasi dengan baik pada jarak 85 meter hingga 160 meter, hal itu dapat diakibatkan oleh beberapa faktor, salah satunya adalah kesalahan perhitungan. Faktor lain yang
dapat mempengaruhi juga dapat berasal dari kesalahan menentukan data mana yang akan digunakan.
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Praktikum Seismik Refraksi Metode Hagiwara
Tugas 3
Pengolahan Data SP1 dan SP4 Sebelum Koreksi
Shot 2.5 m 97.5 m Topo
(m)Beda TAP TBP TAB TP T'AP V1 V2 Hp
Profile
InterfaceX (m) TT (ms) TT (ms)
0 7.2 106.5 100
5 7.2 102.4 100 -1 24.656 102.4 101.12976 25.9262 11.6928 381.6794 1165.501 -4.67493 94.3250749
10 22 95.6 99 0 28.734 95.6 101.12976 23.2042 17.1318 381.6794 1165.501 -4.1841 94.8158961
15 33.4 89.6 98.3 0.7 32.812 89.6 101.12976 21.2822 22.1708 381.6794 1165.501 -3.83754 95.1624641
20 37.8 85.8 98.4 0.6 36.89 85.8 101.12976 21.5602 26.1098 381.6794 1165.501 -3.88766 95.1123362
25 42.4 82.3 98.6 0.4 42.4 82.3 101.12976 23.5702 30.6148 381.6794 1165.501 -4.2501 94.7499003
30 48.1 79.8 99.2 -0.2 48.1 79.8 101.12976 26.7702 34.7148 381.6794 1165.501 -4.82711 94.1728879
35 52.7 76.2 99.4 -0.4 52.7 76.2 101.12976 27.7702 38.8148 381.6794 1165.501 -5.00743 93.9925715
40 54.3 69.7 98.5 0.5 54.3 69.7 101.12976 22.8702 42.8648 381.6794 1165.501 -4.12388 94.8761217
45 56.3 63.5 97.8 1.2 56.3 63.5 101.12976 18.6702 46.9648 381.6794 1165.501 -3.36655 95.6334505
50 58.5 57.6 97.1 1.9 58.5 57.6 101.12976 14.9702 51.0148 381.6794 1165.501 -2.69938 96.3006211
55 62.1 53 96.9 2.1 62.1 53 101.12976 13.9702 55.1148 381.6794 1165.501 -2.51906 96.4809374
60 64.9 47.7 96.4 2.6 64.9 47.7 101.12976 11.4702 59.1648 381.6794 1165.501 -2.06827 96.9317284
65 69.8 44.4 96.7 2.3 69.8 44.4 101.12976 13.0702 63.2648 381.6794 1165.501 -2.35678 96.6432222
70 73.4 39.8 96.5 2.5 73.4 39.8 101.12976 12.0702 67.3648 381.6794 1165.501 -2.17646 96.8235386
75 79.7 38 97.4 1.6 79.7 38 101.12976 16.5702 71.4148 381.6794 1165.501 -2.98789 96.0121149
80 86.4 36.5 98.3 0.7 86.4 36.5 101.12976 21.7702 75.5148 381.6794 1165.501 -3.92553 95.074469785 91.6 33.5 98.7 0.3 91.6 28.9255 101.12976 19.3957 81.9021 381.6794 1165.501 -3.49737 95.502631
90 97.8 21.9 99.5 -0.5 97.8 24.487 101.12976 21.1572 87.2213 381.6794 1165.501 -3.815 95.1850037
95 103.2 7.3 99.9 -0.9 103.2 20.0485 101.12976 22.1187 92.1406 381.6794 1165.501 -3.98837 95.0116295
100 105.7 7.3 99.4
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Praktikum Seismik Refraksi Metode Hagiwara
Equation SP1 & SP 4 Velocity SP1 & SP 4 Source to Source Time SP1 & SP 4
Direct Forward y = 2.62x - 5.3333 V1 Forward 381.6793893 Forward 100.099
Refract Forward y = 0.8156x + 20.578 V1 Reverse 381.6793893 Reverse 102.160525
Direct Reverse y = -2.62x + 256.7 V1 rata-rata 381.6793893 Average 101.1297625
Refract Reverse y = -0.8877x + 104.38 V2 1165.501166
90
91
92
93
94
95
96
97
98
99
100
101
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
K e d a l a m a n ( m )
Jarak (m)
Permodelan Lapisan SP1 & SP4
Sebelum Dikoreksi
Lapisan 1 Lapisan 2
y = 2.62x - 5.3333
y = 0.8156x + 20.578
y = -2.62x + 256.7
y = -0.8877x + 104.38
0
20
40
60
80
100
120
0 20 40 60 80 100
T r a v e l T i m e ( m s )
Distance (m)
Grafik Hubungan SP1 & SP4 Sebelum Dikoreksi
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.8589x + 8.379
0
20
40
60
80
100
0 20 40 60 80 100
T ' A P ( m s )
X (m)
X vs T'AP SP1 & SP4
Sebelum Dikoreksi
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Praktikum Seismik Refraksi Metode Hagiwara
Pengolahan Data SP1 dan SP4 Setelah Koreksi
Δ h Δ t X (m)2.5 m 97.5 m TAP
(Forward)
TBP
(Reverse)
Topo
(m)TAP TBP TAB TP T'AP V1 V2 Hp
Profile
InterfaceTT (ms) TT (ms)
0 7.2 106.5
1 2.62 5 7.2 102.4 4.58 99.78 100 26.648 99.78 102.1099 24.318 14.4889 333.5034 1096.011 -3.862 95.1372
0 0 10 22 95.6 22 95.6 99 30.755 95.6 102.1099 24.245 18.6324 333.5034 1096.011 -3.851 95.1487
-0.7 -1.834 15 33.4 89.6 35.234 91.434 98.3 34.862 91.434 102.1099 24.186 22.7689 333.5034 1096.011 -3.841 95.1581
-0.6 -1.572 20 37.8 85.8 39.372 87.372 98.4 39.372 87.372 102.1099 24.634 27.0549 333.5034 1096.011 -3.912 95.0870
-0.4 -1.048 25 42.4 82.3 43.448 83.348 98.6 43.448 83.348 102.1099 24.686 31.1049 333.5034 1096.011 -3.921 95.0787
0.2 0.524 30 48.1 79.8 47.576 79.276 99.2 47.576 79.276 102.1099 24.742 35.2049 333.5034 1096.011 -3.930 95.0698
0.4 1.048 35 52.7 76.2 51.652 75.152 99.4 51.652 75.152 102.1099 24.694 39.3049 333.5034 1096.011 -3.922 95.0774
-0.5 -1.31 40 54.3 69.7 55.61 71.01 98.5 55.61 71.01 102.1099 24.510 43.3549 333.5034 1096.011 -3.893 95.1067
-1.2 -3.144 45 56.3 63.5 59.444 66.644 97.8 59.444 66.644 102.1099 23.978 47.4549 333.5034 1096.011 -3.808 95.1912
-1.9 -4.978 50 58.5 57.6 63.478 62.578 97.1 63.478 62.578 102.1099 23.946 51.5049 333.5034 1096.011 -3.803 95.1962
-2.1 -5.502 55 62.1 53 67.602 58.502 96.9 67.602 58.502 102.1099 23.994 55.6049 333.5034 1096.011 -3.811 95.1886
-2.6 -6.812 60 64.9 47.7 71.712 54.512 96.4 71.712 54.512 102.1099 24.114 59.6549 333.5034 1096.011 -3.830 95.1696
-2.3 -6.026 65 69.8 44.4 75.826 50.426 96.7 75.826 50.426 102.1099 24.142 63.7549 333.5034 1096.011 -3.834 95.1651
-2.5 -6.55 70 73.4 39.8 79.95 46.35 96.5 79.95 46.35 102.1099 24.190 67.8549 333.5034 1096.011 -3.842 95.1575
-1.6 -4.192 75 79.7 38 83.892 42.192 97.4 83.892 42.192 102.1099 23.974 71.9049 333.5034 1096.011 -3.808 95.1918
-0.7 -1.834 80 86.4 36.5 88.234 38.334 98.3 88.234 38.334 102.1099 24.458 76.0049 333.5034 1096.011 -3.885 95.1149
-0.3 -0.786 85 91.6 33.5 92.386 34.286 98.7 92.386 34.0715 102.1099 24.347 80.2121 333.5034 1096.011 -3.867 95.1325
0.5 1.31 90 97.8 21.9 96.49 20.59 99.5 96.49 29.971 102.1099 24.351 84.3144 333.5034 1096.011 -3.868 95.13190.9 2.358 95 103.2 7.3 100.842 4.942 99.9 100.842 25.8705 102.1099 24.602 88.5406 333.5034 1096.011 -3.907 95.0920
100 105.7 7.3
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Praktikum Seismik Refraksi Metode Hagiwara
Equation SP1 & SP4 Velocity SP1 & SP4 Source to Source Time SP1 & SP4
Direct Forward y = 3.0654x - 10.049 V1 Forward 326.2217003 Forward 102.49
Refract Forward y = 0.816x + 22.93 V1 Reverse 340.785169 Reverse 101.7298
Direct Reverse y = -2.9344x + 284.04 V1 rata-rata 333.5034346 Average 102.1099
Refract Reverse y = -0.8201x + 103.78 V2 1165.501166
92
93
94
95
96
97
98
99
100
101
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
K e d a l a m a n ( m )
Jarak (m)
Permodelan Lapisan SP1 & SP4
Setelah Dikoreksi
Lapisan 1 Lapisan 2
y = 3.0654x - 10.049
y = 0.816x + 22.93
y = -2.9344x + 284.04
y = -0.8201x + 103.78
0
20
40
60
80
100
120
0 20 40 60 80 100
T r a v e l T i m e (
m s )
Distance (m)
Grafik Hubungan SP1 & SP4 Setelah Dikoreksi
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.8198x + 10.522
0
20
40
60
80
100
0 20 40 60 80 100
T ' A P ( m s )
X (m)
X vs T'AP SP1 & SP4
Setelah Dikoreksi
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Praktikum Seismik Refraksi Metode Hagiwara
Pengolahan Data SP3 dan SP4 Sebelum Koreksi
shot 65.8 m 97.5 m Topo
(m)beda TAP TBP TAB TP T'AP V1 V2 Hp
Profile
InterfaceX (m) TT (ms) TT (ms)
65 2.4 44.4 96.7 2.3 7.8455 44.4 43.61783 8.627675 3.531663 448.5717 1204.529 -1.795 94.80412
70 12.1 39.8 96.5 2.5 13.435 39.8 43.61783 9.617175 8.626412 448.5717 1204.529 -2.001 94.59816
75 18.9 38 97.4 1.6 18.9 38 43.61783 13.28218 12.25891 448.5717 1204.529 -2.764 93.83527
80 25.6 36.5 98.3 0.7 25.6 36.5 43.61783 18.48218 16.35891 448.5717 1204.529 -3.847 92.75288
85 30.7 33.5 98.7 0.3 30.7 33.42 43.61783 20.50218 20.44891 448.5717 1204.529 -4.267 92.33241
90 36.9 21.9 99.5 -0.5 36.9 30.91 43.61783 24.19218 24.80391 448.5717 1204.529 -5.035 91.56432
95 42.3 7.3 99.9 -0.9 42.3 28.4 43.61783 27.08218 28.75891 448.5717 1204.529 -5.637 90.96276
y = 1.94x - 123.7
y = 1.1179x - 64.818
y = -2.62x + 256.7
y = -0.502x + 76.09
0
10
20
30
40
50
60 70 80 90 100 110
T r a v e l T i m e ( m s )
Distance (m)
Grafik Hubungan SP3 & SP4 Sebelum Dikoreksi
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.8302x - 50.017
0
510
15
20
25
30
35
60 70 80 90 100
T ' A P ( m s )
X (m)
X vs T'AP SP3 & SP4
Sebelum Dikoreksi
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Praktikum Seismik Refraksi Metode Hagiwara
Equation SP3 & SP4 Velocity SP3 & SP4 Source to Source Time SP3 & SP4
Direct Forward y = 1.94x - 123.7 V1 Forward 515.46392 Forward 44.17725
Refract Forward y = 1.1179x - 64.818 V1 Reverse 381.67939 Reverse 43.0584
Direct Reverse y = -2.62x + 256.7 V1 rata-rata 448.57165 Average 43.617825
Refract Reverse y = -0.502x + 76.09 V2 1204.529
86
88
90
92
94
96
98
100
102
65 70 75 80 85 90 95
K e d a l a m a n ( m )
Jarak (m)
Permodelan Lapisan SP3 & SP4
Sebelum Dikoreksi
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Praktikum Seismik Refraksi Metode Hagiwara
Pengolahan Data SP3 dan SP4 Setelah Koreksi
Δ h Δ t65.8 m 97.5 m TAP
(Forward)
TBP
(Reverse)
Topo
(m)TAP TBP TAB TP T'AP V1 V2 Hp
Profile
InterfaceX (m) TT (ms) TT (ms)
-2.3 -5.127 65 2.4 44.4 7.527385 49.52738 96.7 13.400 49.527 45.672 17.255 4.772 419.56 1207.438 -1.257 95.34215
-2.5 -5.573 70 12.1 39.8 17.67324 45.37324 96.5 17.89 45.373 45.672 17.594 9.096 419.56 1207.438 -1.282 95.31741
-1.6 -3.566 75 18.9 38 22.46687 41.566877 97.4 22.466 41.566 45.672 18.361 13.286 419.56 1207.438 -1.338 95.2615
-0.7 -1.560 80 25.6 36.5 27.16050 38.060508 98.3 27.160 38.060 45.672 19.548 17.386 419.56 1207.438 -1.422 95.17499
-0.3 -0.668 85 30.7 33.5 31.36878 34.168789 98.7 31.368 34.13 45.672 19.829 21.454 419.56 1207.438 -1.445 95.1545
0.5 1.1146 90 36.9 21.9 35.78535 20.785350 99.5 35.785 30.33 45.672 20.442 25.563 419.56 1207.438 -1.490 95.10980
0.9 2.0063 95 42.3 7.3 40.29363 5.2936315 99.9 40.293 26.527 45.672 21.148 29.719 419.56 1207.438 -1.541 95.05839
y = 2.0292x - 124.37
y = 0.8987x - 45.015
y = -2.8875x + 279.96
y = -0.7606x + 98.784
0
10
20
30
40
50
60
60 70 80 90 100
T
r a v e l T i m e ( m s )
Distance (m)
Grafik Hubungan SP3 & SP4 Setelah Dikoreksi
Travel Time vs Distance
Forward 1 Forward 2 Reverse 1 Reverse 2
y = 0.8282x - 48.927
0
510
15
20
25
30
35
60 70 80 90 100
T ' A P ( m s )
X (m)
X vs T'AP SP3 & SP4
Setelah Dikoreksi
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Praktikum Seismik Refraksi Metode Hagiwara
Equation Line 1 Velocity Line 1 Source to Source Time Line 1
Direct Forward y = 2.0292x - 124.37 V1 Forward 492.8050463 Forward 42.60825Refract Forward y = 0.8987x - 45.015 V1 Reverse 346.3203463 Reverse 48.73652
Direct Reverse y = -2.8875x + 279.96 V1 rata-rata 419.5626963 Average 45.67239
Refract Reverse y = -0.7606x + 98.784 V2 1204.529029
92
93
94
95
96
97
98
99
100
101
65 70 75 80 85 90 95
K e d a l a m a n ( m )
Jarak (m)
Permodelan Lapisan SP3 & SP4
Setelah Dikoreksi
Lapisan 1
Lapisan 2
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Praktikum Seismik Refraksi Metode Hagiwara
Hasil Korelasi
Dari korelasi SP1 & SP 4 dengan SP3 dan SP4 diperoleh hasil seperti gambar diatas. Hasil gamabr diatas cukup berkorelasi dengan baik pada
jarak 65 meter hingga 95 meter, hal itu dapat diakibatkan oleh beberapa faktor, salah satunya adalah kesalahan perhitungan. Faktor lain yang dapat
mempengaruhi juga dapat berasal dari kesalahan menentukan data mana yang akan digunakan.
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Praktikum Seismik Refraksi Metode Hagiwara
Kesimpulan
Tugas 1
o Kecepatan lapisan 1 adalah 2932.97 m/s
o Kecepatan lapisan 2 adalah 4278.99 m/s
Tugas 2 SP1 & SP4
o Kecepatan lapisan 1 adalah 335.07 m/s
o Kecepatan lapisan 2 adalah 1091.34 m/s
Tugas 2 SP2 & SP3
o
Kecepatan lapisan 1 adalah 324.67 m/s
o Kecepatan lapisan 2 adalah 1070.09 m/s
Tugas 3 SP1 & SP4 Sebelum Koreksi
o Kecepatan lapisan 1 adalah 381.68 m/s
o
Kecepatan lapisan 2 adalah 1165.50 m/s
o
Tugas 3 SP1 & SP4 Setelah Koreksi
o Kecepatan lapisan 1 adalah 333.50 m/s
o Kecepatan lapisan 2 adalah 1096.01 m/s
Tugas 3 SP3 & SP4 Sebelum Koreksi
o Kecepatan lapisan 1 adalah 448.57 m/s
o
Kecepatan lapisan 2 adalah 1204.53 m/s
Tugas 3 SP1 & SP4 Setelah Koreksi
o Kecepatan lapisan 1 adalah 419.56 m/s
o Kecepatan lapisan 2 adalah 1207.44 m/s
Daftar Pustaka
Asistem Metode Seismik, 2013, Slide Presentasi Praktikum Metode Seismik ,
Yogyakarta : Lab.Geofisika UGM
