| Amplitude versus Distance Tables and Graphs for local high frequency waves and teleseismic long period waves. | |||||||||||||
| Magnitude formulas are given here: http://neic.usgs.gov/neis/phase_data/mag_formulas.html | |||||||||||||
| ML: Local Magnitude based on short period Wood Anderson seismograph | |||||||||||||
| ML = log A - log Ao | |||||||||||||
| Defined by Richter (1935) | |||||||||||||
| where A is the maximum trace amplitude in milimeters recorded on a standard short-period seismometer | |||||||||||||
| and log Ao is a standard value as a function of distance where distance <= 600 kilometers | |||||||||||||
| ML=0 | ML=3 | ML=6 | ML=0 | ML=3 | ML=6 | ||||||||
| (Approximate) | 0 | 3 | 6 | 0 | 3 | 6 | |||||||
| Log Ao | Dist(km) | Ground Motion Amplitude, microns z to peak | Log Amplitude | ||||||||||
| 1.75 | 0.1 | 27.03564 | 27035.641 | 27035640.63 | 1.431937 | 4.431937 | 7.431937 | ||||||
| -1.45 | 10 | 0.017058 | 17.058336 | 17058.33602 | -1.76806 | 1.231937 | 4.231937 | ||||||
| -1.93164799 | 20 | 0.005627 | 5.6271523 | 5627.152331 | -2.24971 | 0.750289 | 3.750289 | ||||||
| -2.21339401 | 30 | 0.002941 | 2.9413226 | 2941.322584 | -2.53146 | 0.468543 | 3.468543 | ||||||
| -2.41329599 | 40 | 0.001856 | 1.856268 | 1856.268004 | -2.73136 | 0.268641 | 3.268641 | ||||||
| -2.56835201 | 50 | 0.001299 | 1.2989267 | 1298.926742 | -2.88642 | 0.113585 | 3.113585 | ||||||
| -2.695042 | 60 | 0.00097 | 0.9702746 | 970.2746043 | -3.01311 | -0.01311 | 2.986895 | ||||||
| -2.80215686 | 70 | 0.000758 | 0.7581931 | 758.1930533 | -3.12022 | -0.12022 | 2.87978 | ||||||
| -2.89494398 | 80 | 0.000612 | 0.6123401 | 612.3400789 | -3.21301 | -0.21301 | 2.786993 | ||||||
| -2.97678802 | 90 | 0.000507 | 0.5071643 | 507.1642703 | -3.29485 | -0.29485 | 2.705149 | ||||||
| -3.05 | 100 | 0.000428 | 0.428486 | 428.4860279 | -3.36806 | -0.36806 | 2.631937 | ||||||
| -3.1162283 | 110 | 0.000368 | 0.3678819 | 367.8818559 | -3.43429 | -0.43429 | 2.565708 | ||||||
| -3.17668999 | 120 | 0.00032 | 0.3200713 | 320.071254 | -3.49475 | -0.49475 | 2.505247 | ||||||
| -3.23230936 | 130 | 0.000282 | 0.2815965 | 281.5965316 | -3.55037 | -0.55037 | 2.449627 | ||||||
| -3.28380486 | 140 | 0.00025 | 0.2501104 | 250.1104329 | -3.60187 | -0.60187 | 2.398132 | ||||||
| -3.33174601 | 150 | 0.000224 | 0.2239704 | 223.9704129 | -3.64981 | -0.64981 | 2.350191 | ||||||
| -3.37659197 | 160 | 0.000202 | 0.2019969 | 201.9968946 | -3.69466 | -0.69466 | 2.305345 | ||||||
| -3.41871827 | 170 | 0.000183 | 0.1833236 | 183.3236058 | -3.73678 | -0.73678 | 2.263218 | ||||||
| -3.45843601 | 180 | 0.000167 | 0.1673018 | 167.3018167 | -3.7765 | -0.7765 | 2.223501 | ||||||
| -3.49600576 | 190 | 0.000153 | 0.1534373 | 153.4372844 | -3.81407 | -0.81407 | 2.185931 | ||||||
| -3.52308999 | 200 | 0.000144 | 0.1441606 | 144.1606322 | -3.84115 | -0.84115 | 2.158847 | ||||||
| -3.58665788 | 210 | 0.000125 | 0.1245314 | 124.5313743 | -3.90472 | -0.90472 | 2.095279 | ||||||
| -3.64726804 | 220 | 0.000108 | 0.10831 | 108.3100166 | -3.96533 | -0.96533 | 2.034669 | ||||||
| -3.70518351 | 230 | 9.48E-05 | 0.094788 | 94.78795572 | -4.02325 | -1.02325 | 1.976753 | ||||||
| -3.76063373 | 240 | 8.34E-05 | 0.0834263 | 83.42629175 | -4.0787 | -1.0787 | 1.921303 | ||||||
| -3.81382003 | 250 | 7.38E-05 | 0.0738102 | 73.81024366 | -4.13188 | -1.13188 | 1.868117 | ||||||
| -3.86492004 | 260 | 6.56E-05 | 0.065617 | 65.61703785 | -4.18298 | -1.18298 | 1.817017 | ||||||
| -3.91409129 | 270 | 5.86E-05 | 0.058593 | 58.59295114 | -4.23215 | -1.23215 | 1.767845 | ||||||
| -3.96147409 | 280 | 5.25E-05 | 0.0525367 | 52.53667353 | -4.27954 | -1.27954 | 1.720463 | ||||||
| -4.00719399 | 290 | 4.73E-05 | 0.0472871 | 47.28709899 | -4.32526 | -1.32526 | 1.674743 | ||||||
| -4.05136376 | 300 | 4.27E-05 | 0.0427143 | 42.71426138 | -4.36943 | -1.36943 | 1.630573 | ||||||
| -4.09408508 | 310 | 3.87E-05 | 0.0387125 | 38.71253255 | -4.41215 | -1.41215 | 1.587852 | ||||||
| -4.13544993 | 320 | 3.52E-05 | 0.0351955 | 35.19546683 | -4.45351 | -1.45351 | 1.546487 | ||||||
| -4.17554182 | 330 | 3.21E-05 | 0.0320919 | 32.09185678 | -4.49361 | -1.49361 | 1.506395 | ||||||
| -4.21443675 | 340 | 2.93E-05 | 0.0293427 | 29.34268922 | -4.5325 | -1.5325 | 1.4675 | ||||||
| -4.25220413 | 350 | 2.69E-05 | 0.0268988 | 26.89877684 | -4.57027 | -1.57027 | 1.429733 | ||||||
| -4.2889075 | 360 | 2.47E-05 | 0.0247189 | 24.71890126 | -4.60697 | -1.60697 | 1.393029 | ||||||
| -4.32460517 | 370 | 2.28E-05 | 0.0227683 | 22.76834654 | -4.64267 | -1.64267 | 1.357331 | ||||||
| -4.35935079 | 380 | 2.1E-05 | 0.0210177 | 21.01773322 | -4.67741 | -1.67741 | 1.322586 | ||||||
| -4.39319382 | 390 | 1.94E-05 | 0.0194421 | 19.44208529 | -4.71126 | -1.71126 | 1.288743 | ||||||
| -4.42617997 | 400 | 1.8E-05 | 0.0180201 | 18.02007902 | -4.74424 | -1.74424 | 1.255757 | ||||||
| -4.45835157 | 410 | 1.67E-05 | 0.0167334 | 16.73343476 | -4.77641 | -1.77641 | 1.223585 | ||||||
| -4.48974787 | 420 | 1.56E-05 | 0.0155664 | 15.56642179 | -4.80781 | -1.80781 | 1.192189 | ||||||
| -4.52040537 | 430 | 1.45E-05 | 0.0145055 | 14.50545307 | -4.83847 | -1.83847 | 1.161531 | ||||||
| -4.55035803 | 440 | 1.35E-05 | 0.0135388 | 13.53875208 | -4.86842 | -1.86842 | 1.131579 | ||||||
| -4.57963754 | 450 | 1.27E-05 | 0.0126561 | 12.65607745 | -4.8977 | -1.8977 | 1.102299 | ||||||
| -4.6082735 | 460 | 1.18E-05 | 0.0118485 | 11.84849446 | -4.92634 | -1.92634 | 1.073663 | ||||||
| -4.63629357 | 470 | 1.11E-05 | 0.0111082 | 11.10818467 | -4.95436 | -1.95436 | 1.045643 | ||||||
| -4.66372371 | 480 | 1.04E-05 | 0.0104283 | 10.42828647 | -4.98179 | -1.98179 | 1.018213 | ||||||
| -4.69058824 | 490 | 9.8E-06 | 0.0098028 | 9.802761241 | -5.00865 | -2.00865 | 0.991348 | ||||||
| -4.71691001 | 500 | 9.23E-06 | 0.0092263 | 9.226280458 | -5.03497 | -2.03497 | 0.965027 | ||||||
| -4.74271053 | 510 | 8.69E-06 | 0.0086941 | 8.69413014 | -5.06077 | -2.06077 | 0.939226 | ||||||
| -4.76801003 | 520 | 8.2E-06 | 0.0082021 | 8.202129731 | -5.08607 | -2.08607 | 0.913927 | ||||||
| -4.79282761 | 530 | 7.75E-06 | 0.0077466 | 7.746562983 | -5.11089 | -2.11089 | 0.889109 | ||||||
| -4.81718128 | 540 | 7.32E-06 | 0.0073241 | 7.324118892 | -5.13524 | -2.13524 | 0.864755 | ||||||
| -4.84108807 | 550 | 6.93E-06 | 0.0069318 | 6.931841065 | -5.15915 | -2.15915 | 0.840849 | ||||||
| -4.86456408 | 560 | 6.57E-06 | 0.0065671 | 6.567084191 | -5.18263 | -2.18263 | 0.817373 | ||||||
| -4.88762457 | 570 | 6.23E-06 | 0.0062275 | 6.227476509 | -5.20569 | -2.20569 | 0.794312 | ||||||
| -4.91028398 | 580 | 5.91E-06 | 0.0059109 | 5.910887374 | -5.22835 | -2.22835 | 0.771653 | ||||||
| -4.93255603 | 590 | 5.62E-06 | 0.0056154 | 5.615399127 | -5.25062 | -2.25062 | 0.749381 | ||||||
| -4.95445375 | 600 | 5.34E-06 | 0.0053393 | 5.339282672 | -5.27252 | -2.27252 | 0.727483 | ||||||