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- Centre National de la Recherche ScientifiqueFR790 papers
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75 papers · 1 filter
Strong evidence of low levels of solar activity during the Maunder Minimum
V. M. S. Carrasco, H. Hayakawa, C. Kuroyanagi +2
The Maunder Minimum (MM) was a period of prolonged solar activity minimum between 1645 and 1715. Several works have identified a significant number of problematic spotless days in…
The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays
Hisashi Hayakawa, Edward W. Cliver, Frédéric Clette +19
We review observations of solar activity, geomagnetic variation, and auroral visibility for the extreme geomagnetic storm on 1872 February 4. The extreme storm (referred to here as…
Relationship of peak fluxes of solar radio bursts and X-ray class of solar flares: Application to early great solar flares
Keitarou Matsumoto, Satoshi Masuda, Masumi Shimojo +1
Large solar flares occasionally trigger significant space-weather disturbances that affect the technological infrastructures of modern civilization, and therefore require further i…
L1 and off Sun-Earth line visible-light imaging of Earth-directed CMEs: An analysis of inconsistent observations
Richard A. Harrison, Jackie A. Davies, David Barnes +1
The efficacy of coronal mass ejection (CME) observations as a key input to space weather forecasting is explored by comparing on and off Sun-Earth line observations from the ESA/NA…
Imaging and spectroscopic observations of extreme-ultraviolet brightenings using EUI and SPICE on board Solar Orbiter
Ziwen Huang, L. Teriaca, R. Aznar Cuadrado +16
The smallest extreme-ultraviolet (EUV) brightening events that were detected so far, called campfires, have recently been uncovered by the High Resolution EUV telescope (HRIEUV), w…
Plasma composition measurements in an active region from Solar Orbiter/SPICE and Hinode/EIS
David H. Brooks, Miho Janvier, Deborah Baker +28
A key goal of the Solar Orbiter mission is to connect elemental abundance measurements of the solar wind enveloping the spacecraft with EUV spectroscopic observations of their sola…