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Forbush decrease model for expanding CMEs affecting Earth and Mars

Total Cost €


EC-Contrib. €






Project "ForbMod" data sheet

The following table provides information about the project.


Organization address
city: GRAZ
postcode: 8010

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Austria [AT]
 Project website
 Total cost 178˙156 €
 EC max contribution 178˙156 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2017
 Duration (year-month-day) from 2017-06-01   to  2019-05-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITAET GRAZ AT (GRAZ) coordinator 178˙156.00


 Project objective

Solar storms, also known as coronal mass ejections (CMEs), are the strongest drivers of space weather. During planetary impacts, they cause short term decreases in the galactic cosmic ray (GCR) flux, called Forbush decreases (FDs). These depressions are observed in the interplanetary space, at the surface of the Earth and recently also on the Mars’ surface by the Curiosity Rover. A large subset of FDs is caused by interplanetary flux ropes (FRs), which expand during their propagation based on observational studies.

Our main goal is to develop and test a new diffusion/expansion FD model which will be able to predict FD amplitude and time-profile caused by the FR passage at a given point in the inner solar system (< 2 AU). The model will be based on the widely accepted approach of the initially empty FR which fills up slowly with particles by perpendicular diffusion, but will be supplemented with the additional mechanism-expansion. The model results will be evaluated using appropriate spacecraft and ground-based measurements at Earth and by the Mars Curiosity Rover. This modeling and multi-spacecraft observational approach will allow testing unanswered hypotheses on the FD properties.

The proposed research will be carried out in a 24-months project at the University of Graz, Austria, with secondments at the Space Research Institute of the Austrian Academy of Science in Graz, and at the Department of Extraterrestrial physics at Christian-Albrechts University in Kiel. These institutions are well recognized in the field of CMEs, FR modeling and GCR detectors and offer outstanding expertise and infrastructure needed for the implementation of the project. The project will generate new knowledge on the properties of cosmic ray decreases by solar storms, which is relevant for space weather, human spaceflight and planetary and exoplanetary atmospheres.


year authors and title journal last update
List of publications.
2019 Dumbovic, Mateja; Guo, Jingnan; Temmer, Manuela; Mays, M. Leila; Veronig, Astrid; Heinemann, Stephan; Dissauer, Karin; Hofmeister, Stefan; Halekas, Jasper; Möstl, Christian; Amerstorfer, Tanja; Hinterreiter, Jürgen; Banjac, Sasa; Herbst, Konstantin; Wang, Yuming; Holzknecht, Lukas; Leitner, Martin; Wimmer-Schweingruber, Robert F.
Unusual plasma and particle signatures at Mars and STEREO-A related to CME-CME interaction
published pages: , ISSN: 1538-4357, DOI:
The Astrophysical Journal In press 2019-10-03
2019 Rodari, Martina; Dumbović, Mateja; Temmer, Manuela; Holzknecht, Lukas M.; Veronig, Astrid
3D Reconstruction and Interplanetary Expansion of the 2010 April 3rd CME
published pages: , ISSN: 1845-8319, DOI:
The Central European Astrophysical Bulletin yearly 2019-10-03
2019 Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer‐Schweingruber, Manuela Temmer, Mateja Dumbović, Astrid Veronig, Christian Möstl, Donald M. Hassler, Cary J. Zeitlin, Bent Ehresmann
Tracking and Validating ICMEs Propagating Toward Mars Using STEREO Heliospheric Imagers Combined With Forbush Decreases Detected by MSL/RAD
published pages: 586-598, ISSN: 1542-7390, DOI: 10.1029/2018sw002138
Space Weather 17/4 2019-10-03
2018 Mateja Dumbović, Bernd Heber, Bojan Vršnak, Manuela Temmer, Anamarija Kirin
An Analytical Diffusion–Expansion Model for Forbush Decreases Caused by Flux Ropes
published pages: 71, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aac2de
The Astrophysical Journal 860/1 2019-10-03
2018 Johan L. Freiherr von Forstner, Jingnan Guo, Robert F. Wimmer-Schweingruber, Donald M. Hassler, Manuela Temmer, Mateja Dumbović, Lan K. Jian, Jan K. Appel, Jaša Čalogović, Bent Ehresmann, Bernd Heber, Henning Lohf, Arik Posner, Christian T. Steigies, Bojan Vršnak, Cary J. Zeitlin
Using Forbush Decreases to Derive the Transit Time of ICMEs Propagating from 1 AU to Mars
published pages: 39-56, ISSN: 2169-9380, DOI: 10.1002/2017ja024700
Journal of Geophysical Research: Space Physics 123/1 2019-10-03
2018 Mateja Dumbović, Jaša Čalogović, Bojan Vršnak, Manuela Temmer, M. Leila Mays, Astrid Veronig, Isabell Piantschitsch
The Drag-based Ensemble Model (DBEM) for Coronal Mass Ejection Propagation
published pages: 180, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aaaa66
The Astrophysical Journal 854/2 2019-10-03
2019 B. Vršnak, T. Amerstorfer, M. Dumbović, M. Leitner, A. M. Veronig, M. Temmer, C. Möstl, U. V. Amerstorfer, C. J. Farrugia, A. B. Galvin
Heliospheric Evolution of Magnetic Clouds
published pages: 77, ISSN: 1538-4357, DOI: 10.3847/1538-4357/ab190a
The Astrophysical Journal 877/2 2019-10-03
2018 Jingnan Guo, Mateja Dumbović, Robert F. Wimmer-Schweingruber, Manuela Temmer, Henning Lohf, Yuming Wang, Astrid Veronig, Donald M. Hassler, Leila M. Mays, Cary Zeitlin, Bent Ehresmann, Olivier Witasse, Johan L. Freiherr von Forstner, Bernd Heber, Mats Holmström, Arik Posner
Modeling the Evolution and Propagation of 10 September 2017 CMEs and SEPs Arriving at Mars Constrained by Remote Sensing and In Situ Measurement
published pages: 1156-1169, ISSN: 1542-7390, DOI: 10.1029/2018SW001973
Space Weather 16/8 2019-10-03
2019 L. Holzknecht, M. Temmer, M. Dumbovic, S. Wellenzohn, K. Krikova, S.G.Heinemann, M. Rodari, B. Vrsnak, A.M. Veronig
CME volume calculation from 3D GCS reconstruction
published pages: , ISSN: 1845-8319, DOI:
The Central European Astrophysical Bulletin yearly 2019-10-03

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