|Frequency:||annually, with mini-cons more frequently|
|Founder:||flatbear and exorin|
|Click here for related articles on Fanlore.|
JaegerCon is a Tumblr convention for Pacific Rim, taking place on the weekend of August 9th-11th. The date was chosen because the first Kaiju attack canonically takes place on August 10th, 2013 (colloquially known as K-day).
The online convention includes a bingo prompt event, a gift exchange, a cosplay contest, interviews with the production team and cast, meet-ups around the world, giveaways, and other events. As some have noted, it is incredibly impressive how quickly this all came together. 
JaegerCon 2013 was a huge success. It kicked off with a message from Guillermo del Toro.
It produced huge numbers of fanfics, fanart, filk, fanmixes, and crafts. In particular, the jaegercon tag shows off a lot of the fanart, music, and crafts, and Writing the Apocalypse, an AO3 collection, was made to show off the fic.
Interviews, with questions submitted from fans, included Sin Dai, Bonnie Siu, Serje Basi (background actors), Callum Green (executive producer), Mark, Charles & Lance Luu (the Wei Tang brothers), Heather Doerksen (Sasha Kaidanovsky), Robert Maillet (Aleksis Kaidonovsky), Rob Kazinsky (Chuck Hansen), Travis Beacham (screenwriter), and finally Guillermo del Toro himself.
Meet-ups took place around the world, many centered around on seeing the film again, as in many places it was still be in theatres that weekend. The largest turnout was at the San Francisco meetup, with almost 50 people attending. Seattle, Toronto, Vancouver, Portland, (and probably others!) had over 20 attendees apiece, while others were just two or three people. Photos from many of the meet-ups, including awesome cosplays, are on the Jaegercon tumblr, or can be found in the tag.