Monitoring a Jolt in a heliplot, I noticed a wave undulation sometimes appeared at some GSN stations. So I collected a heliplot image where it appeared, and arranged the date and time and the observation station, and plotted them on a map with numbering in chronological order. Here is the data for four…Continue
Posted on March 2, 2014 at 11:30am — 3 Comments
At first I'd like to show that a vertical time axis, Hour, in a heliplot can be displayed with slipping off for one hour, which sometimes happens when a heliplot screen is updated, and I have noticed it since the first series.
An example is the following figure.…Continue
Posted on February 28, 2014 at 3:30am — 3 Comments
As shown in a previous blog of "Jolt in Antarctica, Africa and South America some days after M6 Scotia Sea 2014-02-08", a series of Jolt was recorded at some GSN stations in Antarctica, Africa and South America some days…Continue
Posted on February 23, 2014 at 2:37am — 1 Comment
Posted on February 16, 2014 at 11:59am — 2 Comments