World Trade Center Tragedy


Here is a summary of seismic observations of the
two impacts and the two collapses:

DateOrigin
Time
LAT
(°N)
LONG
(°W)
Depth
(km)
Magnitude
mb(Lg)
EST Region
Name
Signa
Duration
09/11/200112:46:3240.7274.000 3308:46:320.8 sec12 seconds
09/11/200113:03:0040.7274.000 2609:03:000.6 sec 6 seconds
09/11/200113:59:1140.7274.000 46209:59:110.8 sec10 seconds
09/11/200114:28:3840.7274.000 58810:28:380.9 sec 8 seconds


Seismograms recorded by LCSN Station PAL (Palisades, NY)