Solar Storms and You!

Activity 9: A Soda Bottle Magnetometer....Data

Data taken between February 15-19, 1999 at NASA, Goddard Space Flight Center with the Mark 2 magnetometer by Dr. Sten Odenwald.


General weather status:

2-15     Quiet.......no oval
2-16     Quiet
2-17     Quiet.......Day 48 POLAR UV shows weak oval
2-18     Disturbed...Weak oval
2-19     Active......Weak Oval, but brightenings in Canada


Magnetometer data:


2-15-99    
12:35      7.0 s    Returned to this value from '15.0' on 2-12

2-16-99
9:00       8.0 s
10:30      7.0 s
12:35      4.0 s
14:15      6.0 o  +/- 1 cm oscillation
15:25      5.0 s
16:05      5.0 s
16:15      4.5 s
16:35      5.0 s
17:00      4.0 s
17:20      5.0 s

2-17-99
13:07      9.5 s
13:38     11.0 s
14:07     12.5 s
14:37     13.0 s
15:05     13.5 s    Disturbed  UT 20:05 POLAR image shows aurora N. Canada
15:35     13.5 s    Quiet
16:10     13.0 s
16:46     13.5 s

2-18-99
9:05      15.0 s
9:55      14.0 s
10:20     14.0 s
10:50     14.0 s
11:25     13.5 s
11:40     14.0 s
12:30     14.0 s
13:20     13.0 s
14:30     12.5 s
15:10     12.0 s
15:30     12.0 s
16:10     12.0 s     Disturbed...Weak Oval

2-19-99
7:00      11.5 s  Active conditions, Day 50, 12:03 UT shows weak oval

The POLAR satellite images showed a new round of auroral activity starting on 2-17-99, and on 2-18-99 the Space Weather Service ( Channel 4) reported a change from Quiet to Disturbed, then on 2-19-99 the conditions were upgraded to Active. Note, our measurements began to creap upward in value at some point between 2-16-99 at 17:20 EST, and 2-17-99 at 13:07 EST in apparent anticipation of the new level of activity beginning on 2-17-99. Note, on the scale I am using, large numbers indicate displacements to the East, and small numbers indicate deflections to the west. The increase from 7.0 cm to 14.0 cm means that the magnetometer was sensing a magnetic deviation to the west.

The Space Environment Service daily report for 2-17-99 indicated that the geomagnetic conditions would be unsettled for the next few days, and a chance for elevated activity on 2-17 and 2-18 due to solar activity from Active Region 8458 on 2-16-99. Several minor flares were reported on 2-16 and 2-17. The ACE satellite detected a 'transient structure' which passed the satellite with elevated speed and density probably caused by solar activity on 2-12-99.

The following image by the POLAR UV imager on 2-19-99 at 12:03 UT shows the status of the auroral oval: