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  • NAM2019
    • Registration
    • Key Dates & Outline Schedule
    • Practical Information
    • Exhibitors
    • Grants & Bursaries
    • Contacts
  • Science
    • Science Programme
    • Parallel Sessions
    • Plenary Talks
    • Community Session
    • Special Lunches
    • Posters
    • Presenter Guidelines
  • Social
    • What's On
    • Welcome Reception
    • RAS Awards Dinner
  • Media
  • Outreach
    • Outreach and Education Day
    • Fringe Event
    • School Visit Day
  • Lancaster
    • Travel
    • Accommodation
    • Childcare
    • Campus Map
    • About Lancaster
    • Code of Conduct

Wednesday

Schedule

id
date time
AM
10:16
Abstract
Active longitudes and rotation rates: a large survey of active regions observed by AIA/SDO.
Wednesday

Abstract details

id
Active longitudes and rotation rates: a large survey of active regions observed by AIA/SDO.
Date Submitted
2019-03-12 12:29:51
Dylan
Williams
Aberystwyth University
Active Region Laboratories
Talk
Dylan Williams, Huw Morgan
A large-scale survey of Active Regions (AR) has been carried out over approximately 8 years, or the entire SDO dataset. Using a 2-stage identification process all observed ARs are identified and tracked in 5 different EUV wavelengths (131, 171, 193, 211 and 304). This reduced set of data leads to several different avenues of research. This first study focuses on active longitudes (AL). Plotting the mean longitudinal positions of these ARs over the entire time period reveals several bands of increased AR frequency drifting faster than the Carrington rotation rate. These bands can last for several years, and are regions that host several distinct ARs over these long periods. Understanding ALs can lead to a better understanding of the production and transport of the magnetic field within the solar interior, and can contribute towards predicting increased space weather risk over long timescales.

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