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. Subsurface Burst. A subsurface burst is an explosion in which the point of the detonation is beneath the surface of land or water. Cratering will generally result from an underground burst, just as for a surface burst. If the burst does not penetrate the surface, the only other hazard will be from ground or water shock. If the burst is shallow enough to penetrate the surface, blast, thermal, and initial nuclear radiation effects will be present, but will be less than for a surface burst of comparable yield. Local fallout will be very heavy if penetration occurs.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Both the author and the website provider assume no liability for damages arising from use of these predictions. They are not certified to be correct, and they do not incorporate the effects of tropical storms, El Niño, seismic events, continental drift, or changes in global sea level.
reply to post by Lilroanie
It is an unusual earthquake signature, but it is an earthquake, not a weapon detonation. The pulses are too long for it to be a weapons detonation. Not all earthquakes have the same signature, but a weapon detonation is going to always be about the same, and the two pulses are too far apart for a weapon.