[MarinTeams] Geomagnetic Storm - more info

[Bill]

https://www.swpc.noaa.gov/news/upgrade-g4-watch-1-2-june

The G4 (Severe) geomagnetic storm watch is now in effect for 1 and 2 June. 

A powerful coronal mass ejection (CME) erupted from the Sun the evening of
30 May. Confidence in an Earth-directed component is good, but the CME
arrival timing is more uncertain due to the current state of the solar wind.
It could arrive as early as late morning EDT, to as late as Sunday evening
EDT of 1 June. The center of the bulk CME material is anticipated to be just
north of Earth, however, Earth will still likely undergo passage of much of
the CME material. 

Arrival will likely lead to immediate geomagnetic disturbances with the
potential for G4. Conditions will likely intensify as CME progression
continues and G4 levels remain possible on Monday, 2 June. Geomagnetic storm
levels will likely begin subsiding by Tuesday, 3 June, with G1-G2
(Minor-Moderate) still possible.

These watches represent potential based on our best analyses. We will not
know the true nature of this CME's geomagnetic storm potential until the CME
arrives at our solar wind observatories located 1 million miles from Earth.
Upon arrival at those spacecraft, we will know the magnetic strength and
orientation that are very important to what levels and duration of
geomagnetic storm conditions are expected to occur and any appropriate
warnings may be issued. 

As always visit our website
(https://www.swpc.noaa.gov/news/upgrade-g4-watch-1-2-june) for the latest
information and updates.