ICMECAT - a catalog of interplanetary coronal mass ejections

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This plot shows all ICMECAT event positions in HEEQ coordinates, with Earth at a fixed position at 0°. The Sun sphere has a size of 10 solar radii.
Clicking on the plot opens an interactive version.

This is the HELIO4CAST interplanetary coronal mass ejection (ICME) catalog (ICMECAT), based on in situ magnetic field and bulk plasma observations in the heliosphere.

This is version 2.3, released 2025-April-9, updated 2025-October-15. doi: 10.6084/m9.figshare.6356420

Rules: If this catalog is used for results that are published in peer-reviewed international journals, please contact chris.moestl@outlook.com for possible co-authorship.

Cite our catalog with this paper: Möstl et al. (2026) (open access, [arxiv] [ADS] ). For a data availability statement, please cite the figshare repository and indicate the figshare version number that you use, e.g. v24 (doi: 10.6084/m9.figshare.6356420.v24).

The catalog is available as python pandas dataframe (pickle), python numpy structured array (pickle), python numpy structured array (.npy, no pickle), json, csv, xlsx, txt, hdf5, html, html with header, and this is the header txt file with comments, references and parameter descriptions.

Here is a a google colab notebook that demonstrates how to work with this and other catalogs on helioforecast.space in python.
Or simply use these lines to import the ICME catalog into python as a pandas dataframe:

import pandas as pd
url='https://helioforecast.space/static/sync/icmecat/HELIO4CAST_ICMECAT_v23.csv'
ic=pd.read_csv(url)
ic.keys()

Number of events in ICMECAT: 1976
ICME observatories: Solar Orbiter, BepiColombo, Parker Solar Probe (PSP), Wind, STEREO-A, STEREO-B, Juno, MAVEN, Venus Express (VEX), MESSENGER, Ulysses.
Time range: December 1990 - August 2025.

Authors: Christian Möstl (1), Eva Weiler (1), Emma E. Davies (1)
(1) Austrian Space Weather Office, GeoSphere Austria, Graz, Austria.
Contributors: Rachel L. Bailey, Martin A. Reiss, Andreas J. Weiss, Tarik Mohammad Salman, Peter Boakes, Alexey Isavnin, Emilia Kilpua, David Stansby, Reka Winslow, Brian Anderson, Lydia Philpott, Vratislav Krupar, Jonathan Eastwood, Benoit Lavraud, Simon Good, Lan Jian, Teresa Nieves-Chinchilla, Cyril Simon Wedlund, Jingnan Guo, Johan von Forstner, Mateja Dumbovic.

Usage: Clicking on the icmecat_id will show a data plot for the given event. In the search box, typing e.g. "PSP 2022" will select all events at Parker Solar Probe in the year 2022. Clicking on a parameter will sort the respective column.