From: Magnetic ripples observed by Swarm satellites and their enhancement during typhoon activity
2013 | 2014 | 2015 | 2016 | |
---|---|---|---|---|
Jan | – | 2 | 1 | 0 |
Feb | – | 1 | 1 | 0 |
Mar | – | 0 | 2 | 0 |
Apr | – | 2 | 1 | 0 |
May | – | 0 | 2 | 0 |
Jun | – | 2 | 2 | 0 |
Jul | – | 5 | 4 | 4 |
Aug | – | 1 | 3 | – |
Sep | – | 5 | 6 | – |
Oct | – | 2 | 3 | – |
Nov | – | 2 | 1 | – |
Dec | 0 | 1 | 1 | – |