In a message dated 6/10/00 12:26:39 AM Eastern Daylight Time, mlamb1@.......... writes: << Thanks Chris, I checked right away, and think I have to withdraw any geo-magnetic conclusions; there just isn't any realistic match comparison. Nice of you to forward the web sites to explore, and answer the question. Take care, Meredith Lamb >> ------------------------------------------------------------------------------ ------------- Hi Meredith, That big pulse you recorded on 8 June was REAL despite your not being able to find it on those high-latitude European magnetic station's recordings. Here's how Jim Mandaville, an amateur in Tuscan, AZ described it: "It hit my magnetometer around 1100 UTC Thursday. The positive jump was so abrupt and strong that when I saw it in the morning I thought (1) my electronics had gone berserk or (2) a prowler had come and parked his getaway car beside my house! But when I checked the USGS Tucson magnetogram, it was identical. This unusual storm remained strongly positive for several hours, then fell back into the negative region (but not strongly so), then slowly recovered through the day. I got a good recording of it all. Here's how Alex McWilliams saw it at his amateur magnetic observatory in Minnesota: "A VERY unusual spike happened at close to 1230 UTC when the pen shot up very rapidly a very large amount and then recovered to original level - all in a matter of perhaps less than a minute. I do not recall moving anything in the house at that time." So you see, Meredith, your recording was no an artifact after all. It was an accurate recording of a real event. By the way, What is a diamagnetic horizontal seismograph and why does it record magnetic storms in addition to earthquakes? Best regards, Cap __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>