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. 2013 Jul 2;5:ecurrents.dis.ad70cd1c8bc585e9470046cde334ee4b. Originally published 2013 Jul 2. [Version 2] doi: 10.1371/currents.dis.ad70cd1c8bc585e9470046cde334ee4b

Cumulative time series of tweets from within a 35 mile radius of the Boston Marathon finish line selected using the stems “explod*”, “explos*” and “bomb*” after the bombings at 2:49.

Cumulative time series of tweets from within a 35 mile radius of the Boston Marathon finish line selected using the stems “explod*”, “explos*” and “bomb*” after the bombings at 2:49.

Public health officials alerted regional emergency departments via the HHAN at 2:59. Reports from news stations such as WCVB, the Associated Press, and CNN followed shortly after.