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TomZ
09-06-2017, 10:58 AM
Not to make matters worse, but first responders should be aware of possible glitches to navigation and communications right during Irma.
It still seems unknown whether a CME even is associated with this.

at 8:02 a.m. EDT (1202 GMT), an X9.3 flare
https://www.space.com/38057-sun-unleashes-decades-strongest-solar-flare.html

CWSmith
09-06-2017, 12:11 PM
^ It looks like a stream interface hit late Monday night and GOES measurements of greater than 10 MeV protons went WAY up.

What is more relevant is that greater than 100 MeV protons spiked up mid-day today.

There could be a CME coming. At least we do appear to be magnetically connected to the source.

On the benign side of things, the next couple of nights could see some very nice aurora further south than is usual if we do get a big hit.

CWSmith
09-07-2017, 09:18 AM
A strong shock hit in the last minutes of Wednesday. Solar cosmic rays are up. Magnetospheric radiation is up. The interplanetary magnetic field rotated south mid-day today. It looks like the CME hit and we could be in for some auroral activity. Let's hope for a clear night wherever you are.

willmarsh3
09-07-2017, 09:23 AM
The Carrington event came to mind:

https://en.wikipedia.org/wiki/Solar_storm_of_1859

CWSmith
09-07-2017, 09:25 AM
^ The Carrington event would have destroyed the satellites that are currently making the measurements.

There have been some big ones in the last decades, but none of them hit the Earth. Aside from the magnitude of the flare and remote observations of the original CME speed, I don't think anyone knows what those events were like at Earth orbit. So far, Carrington holds the record.