Flares and Flare Chat are tools that you can use in Campfire to indicate to nearby players that a Raid or Gym is active. Flare Chat To use Flare
The US military's chaff and flare industry is on fragile ground
Solar flare captured by NASA's Solar Dynamics Observatory in August
Campfire Flare chats went live! : r/TheSilphRoad
Not receibing flare notifications : r/Campfire_Niantic
Campfire Flare chats go live, players can now coordinate Raids via Campfire
When is the next solar flare? Scientists may now know how to predict it - The Jerusalem Post
FLARES, Workzone Safety Products Inc.
Sending Up Flares: Teachers Are Calling For Help - STORIES FROM SCHOOL AZ
Skydiver uses flare during night jump to help guide him to the ground
Gas flaring drops off globally, but US and others buck the trend
McKenzie County fire may have been caused by gas flares
Niantic Campfire