When an earthquake hits, people flood the internet with posts about it--some within 20 or 30 seconds.
[[A room with a desk, chair, and computer are shaking. The person in it is on his phone, using Twitter.]]
RobM163 Huge earthquake here!
Damaging seismic waves travel at 3-5km
s. Fiber signals move at ~200,000kh
s.
(minus network lag)
This means when the seismic waves are about 100km out, they begin to be overtaken by the waves of posts ABOUT them.
[[There is a geographical border on a map; the front edge of the wave of the quake is shown, with the front edge of the wave of tweets surpassing it.]]
People outside this radius may get woord of the quake via Twitter, IRC, or SMS BEFORE the shaking hits.
[[A man and woman are standing, holding cell phones. The woman is looking at hers.]]
Woman: Whoa! Earthquake!
Sadly, a Twitterer's first instinct is not to find shelter.
Man and Woman (on phones): RT @RobM163 Huge earthquake here!
{{Title text: The USGS operates a really neat email
SMS earthquake notification service (earthquake.usgs.gov
ens
) that allows fine-grained control of notifications.}}
Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).
We did not invent the algorithm. The algorithm consistently finds Jesus. The algorithm killed Jeeves. The algorithm is banned in China. The algorithm is from Jersey. The algorithm constantly finds Jesus. This is not the algorithm. This is close.