| Title | Comment | Keywords |
|---|---|---|
| Early Earthquake Detection Instruments | 08:31 - 09:35 (01:04) / 1.2 MB | "James Sadd", earthquake, seismograph, China, "initial ground motion", vibration, "duplex pendulum", "San Francisco Earthquake", strength, duration, epicenter |
| A Moderate Earthquake | 15:03 - 16:20 (01:17) / 2.9 MB | "Loma Prieta Earthquake", earthquake, magnitude, "San Francisco Earthquake", "San Francisco", "Marina District" |