Assumes: diameter = 350 m; velocity 20 km/sec; density = 3 gm/cm3
| -2.35 sec | Inbound asteroid contacts stratopause at 47 km |
| -0.75 sec | Inbound asteroid contacts trophopause at 15 km |
| +0.00 sec | Leading end of asteroid contacts Earth's surface |
| +0.00 sec | Forward shock wave begins travel into Earth and reverse shock wave begins travel back into asteroid |
| +0.02 sec | Asteroid reaches crustal depth of c. 400 m |
| +0.02 sec | Shock wave reaches trailing end of asteroid and thus asteroid vaporized yielding energy = 10 2 to 10 3 MT |
| +0.02 sec | Atmospheric blast wave leaves crater at 20 km/sec and a magnitude 8.4 to 9.0 earthquake leaves crater |
| +0.02 sec | Infrared flashfires start within radius = c. 50 km; total potential flashfire area = c. 7850 km2 |
| +0.02 sec | Ejecta that leaves initial crater at 45 degrees has velocity = c. 71 km/sec at crater rim |
| +0.60 sec | First ejecta initially traveling at 71 km/sec and launched at 45 degrees exits Earth's stratopause (47 km) |
| +2.00 sec | Atmospheric shock-wave peak-pressure front reaches radius = 40 km; potential flattened area = 5000 km2 |
| +2.00 sec | tsunami-wave amplitude (if impact in water) reaches height = c. 250 m at distance of 5 asteroid radii (875 m) |
| +11.5 sec | Transient crater opens to diameter = c. 3.7 km |
| +24.0 sec | Mega-avalanche occurs as transient-crater rim collapses; rim height is reduced by c. 120 m |
| +26.0 sec | Central rebound peak reaches maximum relief and peak collapse begins thus forming a peak ring |
| +203.1 sec | Base of ejecta curtain (inclined at 30-45 degrees) reaches 20.8 km radius (or 6.4 crater radii) |
|
|
|