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