Geoscientific Instrumentation, Methods and Data Systems
Geoscientific Instrumentation, Methods and Data Systems
GI
Articles | Volume 12, issue 1
Articles | Volume 12, issue 1
https://doi.org/10.5194/gi-12-71-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-12-71-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 1
18 Apr 2023
 | 18 Apr 2023

Auroral alert version 1.0: two-step automatic detection of sudden aurora intensification from all-sky JPEG images

Masatoshi Yamauchi and Urban Brändström

Related authors

Observations of Fragmented Aurora-like Emissions and Picket Fence on the Poleward Edge of the Auroral Oval
Sota Nanjo, Katie Herlingshaw, Tima Sergienko, Gaël Cessateur, Noora Partamies, Magnar G. Johnsen, Keisuke Hosokawa, Hervé Lamy, Yasunobu Ogawa, Antti Kero, Shin-ichiro Oyama, and Masatoshi Yamauchi
EGUsphere, https://doi.org/10.5194/egusphere-2025-4560,https://doi.org/10.5194/egusphere-2025-4560, 2025
This preprint is open for discussion and under review for Annales Geophysicae (ANGEO).
Short summary
Leaping and vortex motion of the shock aurora toward the late evening sector observed on 26 February 2023
Sota Nanjo, Masatoshi Yamauchi, Magnar Gullikstad Johnsen, Yoshihiro Yokoyama, Urban Brändström, Yasunobu Ogawa, Anna Naemi Willer, and Keisuke Hosokawa
Ann. Geophys., 43, 303–317, https://doi.org/10.5194/angeo-43-303-2025,https://doi.org/10.5194/angeo-43-303-2025, 2025
Short summary
Lower-thermosphere–ionosphere (LTI) quantities: current status of measuring techniques and models
Minna Palmroth, Maxime Grandin, Theodoros Sarris, Eelco Doornbos, Stelios Tourgaidis, Anita Aikio, Stephan Buchert, Mark A. Clilverd, Iannis Dandouras, Roderick Heelis, Alex Hoffmann, Nickolay Ivchenko, Guram Kervalishvili, David J. Knudsen, Anna Kotova, Han-Li Liu, David M. Malaspina, Günther March, Aurélie Marchaudon, Octav Marghitu, Tomoko Matsuo, Wojciech J. Miloch, Therese Moretto-Jørgensen, Dimitris Mpaloukidis, Nils Olsen, Konstantinos Papadakis, Robert Pfaff, Panagiotis Pirnaris, Christian Siemes, Claudia Stolle, Jonas Suni, Jose van den IJssel, Pekka T. Verronen, Pieter Visser, and Masatoshi Yamauchi
Ann. Geophys., 39, 189–237, https://doi.org/10.5194/angeo-39-189-2021,https://doi.org/10.5194/angeo-39-189-2021, 2021
Short summary
High-latitude crochet: solar-flare-induced magnetic disturbance independent from low-latitude crochet
Masatoshi Yamauchi, Magnar G. Johnsen, Carl-Fredrik Enell, Anders Tjulin, Anna Willer, and Dmitry A. Sormakov
Ann. Geophys., 38, 1159–1170, https://doi.org/10.5194/angeo-38-1159-2020,https://doi.org/10.5194/angeo-38-1159-2020, 2020
Short summary

Cited articles

Akasofu, S.-I.: The development of the auroral substorm, Planet. Space Sci., 12, 273–282, https://doi.org/10.1016/0032-0633(64)90151-5, 1964. 
Akasofu, S.-I.: Physics of magnetospheric substorms, in: Astrophysics and space science library, vol. 47, Reidel, Dordrecht, https://doi.org/10.1007/978-94-010-1164-8, 1977. 
Brändström, B. U. E., Enell, C.-F., Widell, O., Hansson, T., Whiter, D., Mäkinen, S., Mikhaylova, D., Axelsson, K., Sigernes, F., Gulbrandsen, N., Schlatter, N. M., Gjendem, A. G., Cai, L., Reistad, J. P., Daae, M., Demissie, T. D., Andalsvik, Y. L., Roberts, O., Poluyanov, S., and Chernouss, S.: Results from the intercalibration of optical low light calibration sources 2011, Geosci. Instrum. Method. Data Syst., 1, 43–51, https://doi.org/10.5194/gi-1-43-2012, 2012. 
Breiman, L.: Random Forests, Mach. Learn., 45, 5–32, https://doi.org/10.1023/A:1010933404324, 2001. 
Clausen, L. B. N. and Nickisch, H.: Automatic classification of auroral images from the Oslo Auroral THEMIS (OATH) data set using machine learning, J. Geophys. Res., 123, 5640–5647,https://doi.org/10.1029/2018JA025274, 2018.  
More articles (17)
Download
Short summary
Potential users of all-sky aurora images even include power companies, tourists, and aurora enthusiasts. However, these potential users are normally not familiar with interpreting these images. To make them comprehensive for more users, we developed an automatic evaluation system of auroral activity level. The method involves two steps: first making a simple set of numbers that describes the auroral activity and then further simplifying them into several levels (Level 6 is an auroral explosion).
Read more
Share