Earthquakes monitor with magnitude not less than 4

Sun - severe

	131-7.00	Fact	G Geomagnetic Storms Possible widespread voltage control problems and some protective systems will mistakenly trip out key assets from the grid. May experience surface charging and tracking problems, corrections may be needed for orientation problems. Induced pipeline currents affect preventive measures, HF radio propagation sporadic, satellite navigation degraded for hours, low-frequency radio navigation disrupted, and aurora has been seen as low as Alabama and northern California (typically 45° geomagnetic lat.).	S Solar Radiation Storms Radiation hazard avoidance recommended for astronauts on EVA; passengers and crew in high-flying aircraft at high latitudes may be exposed to radiation risk. Single-event upsets, noise in imaging systems, and slight reduction of efficiency in solar panel are likely. Degraded HF radio propagation through the polar regions and navigation position errors likely.	R Radio Blackouts No deviations from the norm in the radio interference environment were recorded.	Forecast	G Geomagnetic Storms forecast Voltage corrections may be required, false alarms triggered on some protection devices. Surface charging may occur on satellite components, drag may increase on low-Earth-orbit satellites, and corrections may be needed for orientation problems. Intermittent satellite navigation and low-frequency radio navigation problems may occur, HF radio may be intermittent, and aurora has been seen as low as Illinois and Oregon (typically 50° geomagnetic lat.).	S Solar Radiation Storms forecast Passengers and crew in high-flying aircraft at high latitudes may be exposed to elevated radiation risk. Infrequent single-event upsets possible. Small effects on HF propagation through the polar regions and navigation at polar cap locations possibly affected.	R Radio Blackouts forecast Limited blackout of HF radio communication on sunlit side, loss of radio contact for tens of minutes. Degradation of low-frequency navigation signals for tens of minutes.
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