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.…

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 after M6 Scotia Sea 2014-02-08. 

A jolt began at 14:10 UTC of…

As mentioned in the previous blog of "Global Tremor after M6 Scotia Sea of 2014-02-08", I noticed that JOLT, not tremor, was recorded at some GSN stations in Antarctica, Africa and South America some days after the earthquake. I show a map of the…

The Scotia Sea earthquake of 2014-02-08 was M 6.0, not huge, but the distinct tremor was recorded at almost all GSN stations of the world. It seemed unusual.…