Power spectra of geomagnetic fluctuations between 0.4 and 40 Hz.
| dc.contributor.advisor | Heinz, O. | |
| dc.contributor.author | Clayton, Frederick William | |
| dc.contributor.corporate | Naval Postgraduate School | |
| dc.contributor.department | Physics | |
| dc.contributor.school | Naval Postgraduate School | |
| dc.contributor.secondreader | Moose, Paul H. | |
| dc.date.accessioned | 2012-11-16T19:31:10Z | |
| dc.date.available | 2012-11-16T19:31:10Z | |
| dc.date.issued | 1979-06 | |
| dc.description.abstract | Power spectra of the fluctuations of the geomagnetic field were obtained for the frequency range of 0,4 - 40 Hz using an optically pumped Cesium vapor magnetometer. The measurements were made at Monterey, California in May, 1979. The spectra display a gradual decrease in slope at low frequencies with zero slope occurring between approximately 5 Hz and 15 Hz followed by a slight increase in slope. Data was collected at local midnight (0000-0200) , local morning (0800-1000) and local afternoon (1600-1800), The morning and afternoon spectra exhibit what is believed to be a Schumann resonance peak at 8.0 Hz. A peak at 2.2 Hz and its first harmonic (4.4 Hz) were also observed, but are believed to be a man-made phenomenon or a sensor related instrumentation effect. Considerable high frequency disturbances (20-40 Hz) were observed around local midnight and are believed to be ELF "Sf erics". A comparison between a magnetically disturbed day (Fredericksburg Index of 7+) and a quiet day (Fredericksburg Index of 2+) at the same time period (0800-1000) showed a difference of 7-9 dB in power spectral density. | en_US |
| dc.description.distributionstatement | Approved for public release; distribution is unlimited. | |
| dc.description.service | Lieutenant, United States Navy | en_US |
| dc.description.uri | http://archive.org/details/powerspectrofgeo1094518837 | |
| dc.identifier.uri | https://hdl.handle.net/10945/18837 | |
| dc.language.iso | en_US | |
| dc.publisher | Monterey, California. Naval Postgraduate School | en_US |
| dc.subject.lcsh | Physics | en_US |
| dc.title | Power spectra of geomagnetic fluctuations between 0.4 and 40 Hz. | en_US |
| dc.type | Thesis | en_US |
| dspace.entity.type | Publication | |
| etd.thesisdegree.discipline | Physics | en_US |
| etd.thesisdegree.grantor | Naval Postgraduate School | en_US |
| etd.thesisdegree.level | Masters | en_US |
| etd.thesisdegree.name | M.S. in Physics | en_US |
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