Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 3. Occurrence and Amplitude as Functions of Magnetic Latitude, Local Time, and Magnetic Disturbance Indices

Details

• Journal Title:
  Space Weather
• Personal Author:
  Engebretson, Mark J. ; Pilipenko, Viacheslav A. ; Steinmetz, Erik S. ; Moldwin, Mark B. ; Connors, Martin G. ; Boteler, David H. ; Singer, Howard J. ; Opgenoorth, Hermann ; Schillings, Audrey ; Ohtani, Shin ; Gjerloev, Jesper ; Russell, Christopher T.
• NOAA Program & Office:
  NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)
• Description:
  Rapid changes of magnetic fields associated with nighttime magnetic perturbation events (MPEs) with amplitudes |ΔB| of hundreds of nT and 5–10 min duration can induce geomagnetically induced currents (GICs) that can harm technological systems. This study compares the occurrence and amplitude of nighttime MPEs with |dB/dt| ≥ 6 nT/s observed during 2015 and 2017 at five stations in Arctic Canada ranging from 64.7° to 75.2° in corrected geomagnetic latitude (MLAT) as functions of magnetic local time (MLT), the SME (SuperMAG version of AE) and SYM/H magnetic indices, and time delay after substorm onsets. Although most MPEs occurred within 30 min after a substorm onset, ∼10% of
• Keywords:
  Atmospheric Science
• Source:
  Space Weather, 19(3)
• DOI:
  https://doi.org/10.1029/2020sw002526
• ISSN:
  1542-7390 ; 1542-7390
• Format:
  PDF
• Publisher:
  American Geophysical Union (AGU)
• Document Type:
  Journal Article
• License:
  https://creativecommons.org/licenses/by/4.0/
• Rights Information:
  CC BY
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:38b304a8bf713e959789ab9582401be289c0afff7bd803569c12cb044ca9de70
• Download URL:
  https://repository.library.noaa.gov/view/noaa/53076/noaa_53076_DS1.pdf
• File Type:
  [PDF - 1.44 MB ]