| Table 1 | |||
| AA Flt 11 | |||
| 2001 | LDEO | 8:46:26 | Original seismic |
| 2004 | Commission | 8:46:40 | (14 seconds difference) |
| UA Flt 175 | |||
| 2001 | LDEO | 9:02:54 | Original seismic |
| 2004 | Commission | 9:03:11 | (17 seconds difference) |




| Table 2 | |||
| AA Flt 11 | |||
| 2001 | LDEO | 8:46:26 | Original seismic |
| 2001 | FAA | 8:46:35 | Rejected by Commission |
| 2002 | NTSB | 8:46:40 | |
| 2004 | Commission | 8:46:40 | |
| UA Flt 175 | |||
| 2002 | NTSB | 9:02:40 | Rejected by Commission |
| 2001 | LDEO | 9:02:54 | Original seismic |
| 2004 | Commission | 9:03:11 | |
| 2001 | FAA | 9:03:14 | Rejected by Commission |

| Table 3 | |||
| AA Flt 11 | |||
| 2001 | LDEO | 8:46:26 | Original seismic |
| 2004 | NIST | 8:46:30 | Artificial |
| 2001 | FAA | 8:46:35 | Rejected by Commission |
| 2002 | NTSB | 8:46:40 | |
| 2004 | Commission | 8:46:40 | |
| UA Flt 175 | |||
| 2002 | NTSB | 9:02:40 | Rejected by Commission |
| 2001 | LDEO | 9:02:54 | Original seismic |
| 2004 | NIST | 9:02:59 | Adjusted per TV |
| 2004 | Commission | 9:03:11 | |
| 2001 | FAA | 9:03:14 | Rejected by Commission |

| Table 4 | |||
| AA Flt 11 | |||
| 2001 | LDEO | 8:46:26 | Original seismic |
| 2005 | LDEO | 8:46:29 | Revised per NIST contract |
| 2004 | NIST | 8:46:30 | Artificial |
| 2001 | FAA | 8:46:35 | Rejected by Commission |
| 2002 | NTSB | 8:46:40 | |
| 2004 | Commission | 8:46:40 | |
| UA Flt 175 | |||
| 2002 | NTSB | 9:02:40 | Rejected by Commission |
| 2001 | LDEO | 9:02:54 | Original seismic |
| 2005 | LDEO | 9:02:57 | Revised per NIST contract |
| 2004 | NIST | 9:02:59 | Adjusted per TV |
| 2004 | Commission | 9:03:11 | |
| 2001 | FAA | 9:03:14 | Rejected by Commission |