[HN Gopher] The Return of the X-Flares
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The Return of the X-Flares
Author : uticus
Score : 23 points
Date : 2023-02-13 20:35 UTC (2 hours ago)
(HTM) web link (www.swpc.noaa.gov)
(TXT) w3m dump (www.swpc.noaa.gov)
| localplume wrote:
| What is the best way to mitigate the effects? I guess nothing for
| long distance since the radio waves need to bounce off the
| atmosphere, but what about for more local/direct line of sight?
| fhars wrote:
| Fibre optics deployed under the surface. Copper cables may work
| too for smaller flares, but they tend to burn up during larger
| events. See also https://en.wikipedia.org/wiki/Carrington_Event
| sidewndr46 wrote:
| I don't think all Fiber optic is free from the effects of
| geomagnetic storms like the Carrington event. Lots of "fiber"
| also has copper along with it for critical telemetry and for
| powering repeaters placed directly into the cable assembly.
| If the repeaters burn up, the cable still fails.
|
| That being said, if a geomagnetic storm takes out fiber laid
| on the bottom of the ocean we're probably all going to be
| needing new chromosomes shortly anyhow.
| lxgr wrote:
| Fiber optics still need amplifiers every couple of kilometers
| - and to feed these, you'll need a metal-based electricity
| supply.
| dark-star wrote:
| fiber optics might give you data, but you cannot run power
| over them, and power lines are basically huge antennas...
| There's not a lot you can do to mitigate that
| tagami wrote:
| Double whammy -- right over the South Atlantic Anomaly.
| gnatman wrote:
| >More flares are expected from this region as it moves across the
| sun creating occasional degradation of high frequency (3-30 MHz)
| communication.
|
| that's short wave radio, right?
| vitaflo wrote:
| More specifically the HF band.
| lxgr wrote:
| Yes:
|
| > There is no official definition of the band, but the range
| always includes all of the high frequency band (HF), which
| extends from 3 to 30 MHz (100 to 10 metres)
|
| (from https://en.wikipedia.org/wiki/Shortwave_radio)
| ggm wrote:
| Periodic reminders of the fragility of systems like power
| distribution if the energy cost for arcing reduces is good (I
| believe that's only one of the risks from a coronal mass ejection
| on powerlines and associated equipment)
|
| The problem is that coronal mass ejection is the more likely
| event but by no means the worst: extreme gamma ray bursts[0]
| would wipe the global EEPROM (wetware) at scale.
|
| https://en.m.wikipedia.org/wiki/Gamma-ray_burst
| LargoLasskhyfv wrote:
| Nope. Gammaraybust is my WiFi-ID, which is the shield I've put
| up against that!
| mzerod wrote:
| Keeping an eye on this http://websdr.ewi.utwente.nl:8901/fullday/
| for the effects on the HF radio band, it might be quite
| interesting.
| gattr wrote:
| Shameless plug: I make time-lapse animations of solar flares
| (among other things) for fun, like this M-class [1] (46 min. of
| real time, 90 mm diameter telescope with narrow band Hydrogen-
| alpha filter).
|
| [1] https://www.astrobin.com/289991/?nc=collection&nce=1468
| somat wrote:
| https://www.spaceweather.gov/
|
| The Coronal Mass Ejections item shows it particularly well.
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(page generated 2023-02-13 23:00 UTC)