S-transform view of geomagnetically induced currents during geomagnetic superstorms

Details S-transform view of geomagnetically induced currents during geomagnetic superstorms S-transform view of geomagnetically induced currents during geomagnetic superstorms

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3312108p&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 12, CiteID L12108

Physics

5

Space Weather: Geomagnetically Induced Currents, Geomagnetism And Paleomagnetism: Geomagnetic Induction, Hydrology: Time Series Analysis (3270, 4277, 4475), Magnetospheric Physics: Magnetic Storms And Substorms (7954)

Scientific paper

A novel time-frequency analysis method (S-transform) capable of handling noisy non-stationary signals is applied to study the properties of geomagnetically induced current (GIC) fluctuations in the Finnish natural gas pipeline. New local time- and storm phase-dependent S-transform spectral properties of auroral region GIC fluctuations during geomagnetic superstorms are reported. More specifically, the S-transform spectra have two distinct regions containing the most of the spectral power that persisted from storm to storm: main phase-related wide-band fluctuations driven possibly by a substorm-type ionospheric activity centered around the local midnight and recovery phase-related narrow-band fluctuations associated with Pc5 range geomagnetic pulsations in the local morning region. Based on this observed ``stability'', a new S-transform-based statistical approach using, for example, an ensemble of different S-transform responses for known storms is proposed for GIC prediction.

Affiliated with

Also associated with

No associations

Rating

S-transform view of geomagnetically induced currents during geomagnetic superstorms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with S-transform view of geomagnetically induced currents during geomagnetic superstorms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and S-transform view of geomagnetically induced currents during geomagnetic superstorms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1060771