The image below is a magnetic record or "magnetogram" from the magnetic storm of May 5, 1998, as observed by the Kakioka observatory in Japan. The top trace is the one characterizing the storm and the drop is close to 3 divisions or about 130 nT, occuring over about 3 hours. The same observatory can also also provide you with today's magnetic record. |
The disturbing field pointed southward, suggesting that it came from a "ring current" circling the Earth.
Author and Curator: Dr. David P. Stern Mail to Dr.Stern: education("at" symbol)phy6.org Re-formatted 11-15-2004 |