Colombia Seismic Sim M7.4

Western Colombia Epicentral Wave Propagation & Building Resonance Model
Wave Front Propagation 0.0s / 60.0s
15 km
~6.0 km/s
~3.5 km/s
Target Observation Site Pop: 2.2M
Hypocentral Dist.
0 km
P-Wave Arrival
0.0 s
S-Wave Arrival
0.0 s
Warning Window
0.0 s
Peak Ground Accel.
0.00 %g
Est. Intensity (MMI)
VIII
Structural Resonance Response Frequency Matching

Models structural drift response based on wave frequency dispersion relative to focal depth and hypocentral distance.

Low-rise (1-3 fl)
Mid-rise (4-10 fl)
High-rise (10+ fl)
Scenario Assessment Summary

M7.4 earthquake at 15 km depth. S-wave arrives at Cali in 0.0s with PGA of 0.00%g (MMI VIII). High-rise structures experience long-period ground motion amplification.

Follow the saved seismic demonstration formulas and explicit fixture branches

Read the explanation

The saved simulation uses a straight hypocentral path and fixed wave speeds. An illustrative epicentral distance forty-five kilometers and depth eighteen point five kilometers give a path about forty-eight point six six kilometers by the square root of distance squared plus depth squared. Dividing by six kilometers per second gives the P arrival about eight point one one seconds; dividing by three point five gives the S arrival about thirteen point nine seconds. Both bars share forty pixels per second. These are saved demonstration assumptions, not operational earthquake alerts. In the saved wave propagation view, radius grows as elapsed seconds times fixed wave speed. At ten seconds, the P radius is sixty kilometers and the S radius thirty-five kilometers. Both bars show kilometers using ten pixels per kilometer. The displayed map is a visualization under constant isotropic speeds. Neither the wave circles nor the fixed city fixture account for three-dimensional geology, actual seismic measurements, or an operational warning network. The source keeps the epicentral distance fixed for a chosen city and adds depth through a right-triangle path. For an illustrative epicentral distance thirty kilometers, depth ten gives square root of one thousand, about thirty-one point six two kilometers. Depth forty gives fifty kilometers. Both bars depict kilometers on one twelve-pixel scale. Longer path delays arrivals and feeds the written attenuation expression. The city and event fixture remain authored scenario data, rather than an independently verified earthquake report.

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