Oct 27 – 31, 2025
Europe/Stockholm timezone

How much can we learn from low-coronal signatures of CMEs for space weather prediction?

Oct 28, 2025, 11:00 AM
15m
Idun

Idun

Oral SWR2 - Interdisciplinary Insights into Space Weather Events of Solar Cycle 25: From Solar Origins to Planetary Impacts SWR2 – Interdisciplinary Insights into Space Weather Events of Solar Cycle 25: From Solar Origins to Planetary Impacts

Speaker

Nariaki Nitta (Lockheed Martin Advanced Technology Center)

Description

Solar coronal mass ejections (CMEs) leave several signatures in the low corona as identified in EUV and X-ray images, such as intense flares, dimmings, EUV waves, etc., before they appear in white-light coronagraph images. Among them, coronal dimmings are arguably the most reliable indicator of the CME, but their predictive potential for space weather is not yet demonstrated beyond the general remark that dimming regions may represent locations of mass evacuation due to the CME, including the footprints of the flux rope that drives it. We statistically study how much of the properties of CMEs and their heliospheric consequences, i.e., interplanetary CMEs (ICMEs), may be learned from the nascent CMEs as captured in EUV images from SDO, STEREO and Solar Orbiter by correlating observed CME proxies with ICMEs in both directions. We also use AWSoM (Alfven-Wave Solar Model) simulations to understand the link between the solar origin and 1 AU consequences of CMEs of different magnitudes.

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Primary author

Nariaki Nitta (Lockheed Martin Advanced Technology Center)

Co-authors

Dr Meng Jin (Lockheed Martin Advanced Technology Center) Dr Karin Dissauer (NorthWest Research Associates)

Presentation materials

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