Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a–b) Cold ion densities measured by spacecraft L01, L02, L04, and L97 along their geosynchronous orbits during 2‐h intervals indicated at the top of the figures. The densities are colored according to the color scale. THEMIS spacecraft locations are also shown. (c–l) Similar to Figure 3 but showing measurements on October 11, 2010.
