Matches in SemOpenAlex for { <https://semopenalex.org/work/W2991454686> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W2991454686 abstract "In this poster we describe a statistical analysis of extreme temporal changes in the horizontal component of the geomagnetic field (dB/dt) – an important indicator of geomagnetically induced currents. Extreme value theory is applied to data from 125 magnetometers in the global SuperMAG archive – with an average of 28 years of measurements per site – to determine return levels (RL) of |dB/dt| expected over periods of 100 years or more. This is achieved by fitting generalized Pareto (GP) distributions to declustered measurements of |dB/dt| above a 99.97-percentile threshold. Since large fluctuations are driven by diverse magneto-ionospheric driving processes (substorm expansions, sudden commencements, Pc5 ULF waves, etc.), the occurrence rate and high percentiles of |dB/dt| vary with geomagnetic latitude, magnetic local time (MLT), season, and with the compass direction of the fluctuation, dB. The interplanetary magnetic field orientation also exerts a strong influence on these patterns of occurrence, which we present alongside examples of fitted smoothing functions (splines and limited-order spherical harmonics and polynomials). By adapting statistical methods developed for the directional analysis of extreme ocean wave heights, we show how |dB/dt| GP distributions and RLs are generated for data sets sectored by compass direction (or equivalently by season, or MLT sector) and then combined and compared with GP distributions (and RLs) that ignore directionality or seasonal/diurnal variation." @default.
- W2991454686 created "2019-12-05" @default.
- W2991454686 creator A5017905720 @default.
- W2991454686 creator A5019290051 @default.
- W2991454686 creator A5086083712 @default.
- W2991454686 date "2019-11-22" @default.
- W2991454686 modified "2023-09-27" @default.
- W2991454686 title "Modelling directionality, seasonality, and local time dependences in extreme geomagnetic field fluctuations" @default.
- W2991454686 hasPublicationYear "2019" @default.
- W2991454686 type Work @default.
- W2991454686 sameAs 2991454686 @default.
- W2991454686 citedByCount "0" @default.
- W2991454686 crossrefType "journal-article" @default.
- W2991454686 hasAuthorship W2991454686A5017905720 @default.
- W2991454686 hasAuthorship W2991454686A5019290051 @default.
- W2991454686 hasAuthorship W2991454686A5086083712 @default.
- W2991454686 hasConcept C105795698 @default.
- W2991454686 hasConcept C115260700 @default.
- W2991454686 hasConcept C121332964 @default.
- W2991454686 hasConcept C127313418 @default.
- W2991454686 hasConcept C130443932 @default.
- W2991454686 hasConcept C13280743 @default.
- W2991454686 hasConcept C147581598 @default.
- W2991454686 hasConcept C157899998 @default.
- W2991454686 hasConcept C199635899 @default.
- W2991454686 hasConcept C2776718089 @default.
- W2991454686 hasConcept C33923547 @default.
- W2991454686 hasConcept C39432304 @default.
- W2991454686 hasConcept C41479618 @default.
- W2991454686 hasConcept C49204034 @default.
- W2991454686 hasConcept C62520636 @default.
- W2991454686 hasConcept C8058405 @default.
- W2991454686 hasConcept C91586092 @default.
- W2991454686 hasConceptScore W2991454686C105795698 @default.
- W2991454686 hasConceptScore W2991454686C115260700 @default.
- W2991454686 hasConceptScore W2991454686C121332964 @default.
- W2991454686 hasConceptScore W2991454686C127313418 @default.
- W2991454686 hasConceptScore W2991454686C130443932 @default.
- W2991454686 hasConceptScore W2991454686C13280743 @default.
- W2991454686 hasConceptScore W2991454686C147581598 @default.
- W2991454686 hasConceptScore W2991454686C157899998 @default.
- W2991454686 hasConceptScore W2991454686C199635899 @default.
- W2991454686 hasConceptScore W2991454686C2776718089 @default.
- W2991454686 hasConceptScore W2991454686C33923547 @default.
- W2991454686 hasConceptScore W2991454686C39432304 @default.
- W2991454686 hasConceptScore W2991454686C41479618 @default.
- W2991454686 hasConceptScore W2991454686C49204034 @default.
- W2991454686 hasConceptScore W2991454686C62520636 @default.
- W2991454686 hasConceptScore W2991454686C8058405 @default.
- W2991454686 hasConceptScore W2991454686C91586092 @default.
- W2991454686 hasLocation W29914546861 @default.
- W2991454686 hasOpenAccess W2991454686 @default.
- W2991454686 hasPrimaryLocation W29914546861 @default.
- W2991454686 hasRelatedWork W1637205778 @default.
- W2991454686 hasRelatedWork W1964137060 @default.
- W2991454686 hasRelatedWork W1984444780 @default.
- W2991454686 hasRelatedWork W1987910067 @default.
- W2991454686 hasRelatedWork W1992792450 @default.
- W2991454686 hasRelatedWork W2114141440 @default.
- W2991454686 hasRelatedWork W2151083650 @default.
- W2991454686 hasRelatedWork W2187987044 @default.
- W2991454686 hasRelatedWork W2483124877 @default.
- W2991454686 hasRelatedWork W2755914610 @default.
- W2991454686 hasRelatedWork W2946589838 @default.
- W2991454686 hasRelatedWork W2959485548 @default.
- W2991454686 hasRelatedWork W2968625264 @default.
- W2991454686 hasRelatedWork W2999085636 @default.
- W2991454686 hasRelatedWork W3004136112 @default.
- W2991454686 hasRelatedWork W3100707057 @default.
- W2991454686 hasRelatedWork W3206935187 @default.
- W2991454686 hasRelatedWork W38076722 @default.
- W2991454686 hasRelatedWork W4674788 @default.
- W2991454686 hasRelatedWork W2945787305 @default.
- W2991454686 isParatext "false" @default.
- W2991454686 isRetracted "false" @default.
- W2991454686 magId "2991454686" @default.
- W2991454686 workType "article" @default.