Seismology and geophysics, computed in your browser
GDBS runs forward geophysical models directly in the browser - deterministic, no install, no compute queue. It evaluates published Earth-structure models and analytic deformation sources so you can check a result in seconds, then move the full inverse or waveform problem to HPC.
The same calculation runs the same way on any machine that opens the page. This is a bridge to high-performance computing for full waveform tomography and large-scale inversion, not a replacement for it.
What it computes
- PREM seismic velocities (Vp, Vs) and Rayleigh-wave dispersion against the Dziewonski-Anderson 1981 reference Earth model.
- Okada fault dislocation: surface displacement from a rectangular dislocation in an elastic half-space.
- Mogi volcanic source: surface deformation from a point pressure source.
- Seismic moment and moment magnitude relations.
- Gutenberg-Richter frequency-magnitude statistics.
Validated results
- Verified PREM seismic velocities: Vp(70 km) = 8.10 km/s and Vp(2700 km) = 13.65 km/s, by independent evaluation of the Dziewonski-Anderson 1981 model (Phys. Earth Planet. Int. 25, 297).
- Verified Seismic moment at Mw 7.0 = 3.98e19 N*m, following the Hanks-Kanamori moment-magnitude relation (JGR 84, 2348).
- Verified Okada dislocation reproduces the 1995 Kobe fault geometry surface displacement (Okada 1985).
Honest scope: these are forward models evaluated against published Earth structure and analytic source solutions - a bridge to full waveform-tomography HPC, not a surrogate for it.
References
- Dziewonski, A. M., & Anderson, D. L. (1981). Preliminary reference Earth model. Phys. Earth Planet. Int. 25, 297.
- Hanks, T. C., & Kanamori, H. (1979). A moment magnitude scale. JGR 84, 2348.
- Okada, Y. (1985). Surface deformation due to shear and tensile faults in a half-space. Bull. Seismol. Soc. Am. 75, 1135.
Reproduce it
Open GDBS and run these models yourself, or browse the full set of validated results.
Open GDBS
All validated results
Full matrix