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The official planetary K p-index is derived by calculating a weighted average of K-indices from a network of 13 geomagnetic observatories at mid-latitude locations.Since these observatories do not report their data in real-time, various operations centers around the globe estimate the index based on data available from their local network of observatories.
A geomagnetic storm, also known as a magnetic storm, is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave. The disturbance that drives the magnetic storm may be a solar coronal mass ejection (CME) or (much less severely) a co-rotating interaction region (CIR), a high-speed stream of solar wind originating ...
These watches are issued by local NWS Weather Forecast Offices, not the Storm Prediction Center. Below is the first PDS flash flood watch, which was issued by the National Weather Service Forecast Office in Memphis, Tennessee, on April 24, 2011, as mentioned above. [5]
Get the New York, NY local weather forecast by the hour and the next 10 days.
Reports initially predicted that the CME could graze Earth, [40] however geomagnetic storms on 30–31 October only reached a moderate K p index of 4. [41] On 3 and 4 November, the K p index reached 8−, equivalent to a G4 geomagnetic storm. [42] This was the most intense geomagnetic storm to hit Earth since September 2017.
The 23 March CME arrived at around 24/1411 UTC. Severe (G4) geomagnetic storming has been observed and is expected to continue through the remainder of the 24 March-UTC day and into the first half ...
The March 1989 geomagnetic storm included multiple space weather effects: SEP, CME, Forbush decrease, ground level enhancement, geomagnetic storm, etc.. The 2000 Bastille Day event coincided with exceptionally bright aurora. April 21, 2002, the Nozomi Mars Probe was hit by a large SEP event that caused large-scale failure. The mission, which ...
An extreme (G5) geomagnetic storm alert was issued by the National Oceanic and Atmospheric Administration (NOAA) – the first in almost 20 years. [ 96 ] [ 97 ] The final storms reaching the highest level of NOAA's G-scale before Solar Cycle 25 occurred in 2005 in May, [ 98 ] [ 99 ] [ 100 ] August, [ 101 ] and September, respectively.