5 ms·

The 23:08 timestamp on the video is 3 minutes before the earthquake struck at 23:11 [1]. If we understood this phenomenon well enough to be predictive, it would

• netsharc 3y ago
  But how accurate is this device's timestamp? Even with NTP, there could be a lot of skew if it only syncs once in a while and has a bad internal clock otherwise. The font of the timestamp/label is familiar though, so it's probably a cheap Chinese device, and I'd guess they're so widely used that they've managed to make the clock to be quite accurate.
  • Buttons840 3y ago
    Do you suspect that the time was wrong and the footage shown was actually shot during the 6.8 earthquake? Wouldn't the camera shaking make it clear when the earthquake was happening?
    • dredmorbius 3y ago
      P-waves can take several seconds to travel from the visible horizon (or beyond, as transformer explosions are visible for a long distance) to your location. If the camera is on the far-side of the transformer from the epicenter, then it could take from 5 to 30 or more seconds for ground shocks to be apparent. Speed of travel through solid rock is about 10,000 km/h, slower through softer or more disrupted geology.