2.1. Twitter data collection

Data about specific events have been obtained through the use of a Twitter application program or through Twitter partner sites. This study characterizes public responses on Twitter for different kinds of events such as storm, earthquake, wildfire, terror attacks, and other events. Two recent extreme events which happened in the last 4 years were used as case studies, including Brisbane hailstorm and California wildfire.

Figure 1. The block diagram of the proposed method of event detection from Twitter.
