2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/Catalog/STEREO/ICMECAT NASA Catalog ICMECAT - a catalog of interplanetary coronal mass ejections 2026-02-02T13:10:25Z 2025-07-09T10:37:17 Only known prior ReleaseDate of the metadata 2026-02-02T13:10:25Z Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB This is the HELIO4CAST interplanetary coronal mass ejection (ICME) catalog (ICMECAT), based on in situ magnetic field and bulk plasma observations in the heliosphere. spase://SMWG/Person/Christian.Moestl Author spase://SMWG/Person/Eva.Weiler Author spase://SMWG/Person/Emma.E.Davies Author spase://SMWG/Person/Olga.Y.Uritskaya MetadataContact spase://SMWG/Repository/Helio4cast https://helioforecast.space/icmecat HTML spase://SMWG/Instrument/STEREO-A/Ephemeris spase://SMWG/Instrument/STEREO-B/Ephemeris spase://SMWG/Instrument/SolarOrbiter/Ephemeris spase://SMWG/Instrument/ParkerSolarProbe/Ephemeris spase://SMWG/Instrument/BepiColombo/Ephemeris spase://SMWG/Instrument/Wind/Ephemeris spase://SMWG/Instrument/VenusExpress/ASPERA4 spase://SMWG/Instrument/MESSENGER/Ephemeris spase://SMWG/Instrument/MAVEN/Ephemeris spase://SMWG/Instrument/Ulysses/Ephemeris InterplanetaryCoronalMassEjection 1990-12-11T04:00:00 2024-12-20T22:34:00 icmecat_id icmecat_id: The unique identifier for the observed ICME. unit: string. Housekeeping sc insitu sc insitu: The name of the in situ observing spacecraft. unit: string. Other icme_start_time icme_start_time: Shock arrival or density enhancement time, can be similar to mo_start_time. unit: UTC. Temporal mo_start_time mo_start_time: Start time of the magnetic obstacle (MO), including flux ropes, flux-rope-like, and ejecta signatures. unit: UTC. Temporal mo_end_time mo_end_time: End time of the magnetic obstacle. unit: UTC. Temporal mo_sc_heliodistance mo_sc_heliodistance: Heliocentric distance of the spacecraft at mo_start_time. unit: AU. Positional mo_sc_long_heeq mo_sc_long_heeq: Heliospheric longitude of the spacecraft at mo_start_time, range [-180,180]. unit: degree (HEEQ). Orientation mo_sc_lat_heeq mo_sc_lat_heeq: Heliospheric latitude of the spacecraft at mo_start_time, range [-90,90]. unit: degree (HEEQ). Orientation icme_duration icme_duration: Duration of the interval between icme_start_time and mo_endtime. unit: hours. Temporal icme_bmax icme_bmax: Maximum total magnetic field in the full icme interval (icme_start_time to mo_end_time). unit: nT. Other icme_bmean icme_bmean: Mean total magnetic field during the full icme interval (icme_start_time to mo_end_time). unit: nT. Other icme_bstd icme_bstd: Standard deviation of the total magnetic field from icme_start_time to mo_end_time. unit: nT. Other icme_speed 12: icme_speed_mean: Mean proton speed from icme_start_time to mo_end_time. unit: km/s. Velocity icme_speed_std icme_speed_std: Standard deviation of proton speed from icme_start_time to mo_end_time. unit: km/s. Velocity mo_duration mo_duration: Duration of the interval between mo_start_time and mo_endtime. unit: hours. Velocity mo_bmax mo_bmax: Maximum total magnetic field in the magnetic obstacle interval (mo_start_time to mo_end_time). unit: nT. Other mo_bmean mo_bmean: Mean total magnetic field in the magnetic obstacle. unit: nT. Other mo_bstd mo_bstd: Standard deviation of the total magnetic field in the magnetic obstacle. unit: nT. Other mo_bzmean mo_bzmean: Mean magnetic field Bz component in the magnetic obstacle. unit: nT. Other mo_bzmin mo_bzmin: Minimum magnetic field Bz component in the magnetic obstacle. unit: nT. Other mo_bzstd mo_bzstd: Standard deviation of the magnetic field Bz component in the magnetic obstacle. unit: nT. Other mo_bymean mo_bymean: Mean magnetic field By component in the magnetic obstacle. unit: nT. Other mo_bystd : mo_bystd: Standard deviation of the magnetic field By component in the magnetic obstacle. unit: nT. Other mo_speed_mean mo_speed_mean: Mean proton speed from mo_start_time to mo_end_time. unit: km/s. Velocity mo_speed_std mo_speed_std: Standard deviation of proton speed from mo_start_time to mo_end_time. unit: km/s. Velocity mo_expansion_speed mo_expansion_speed: Difference between proton speed at mo_start_time to proton speed at mo_end_time. unit: km/s. Velocity mo_pdyn_mean mo_pdyn_mean: Mean proton dynamic pressure from mo_start_time to mo_start_time. unit: nPa. Other mo_pdyn_std mo_pdyn_std: Standard deviation of proton dynamic pressure from mo_start_time to mo_start_time. unit: nPa. Other mo_density_mean mo_density_mean: Mean proton density from mo_start_time to mo_start_time. unit: cm^-3. Other mo_density_std mo_density_std: Standard deviation of proton density from mo_start_time to mo_start_time. unit: cm^-3 Other mo_temperature_mean mo_temperature_mean: Mean proton temperature from mo_start_time to mo_start_time. unit: K. Other mo_temperature_std mo_temperature_std: Standard deviation of proton temperature from mo_start_time to mo_end_time. unit: K. Other sheath_speed_mean sheath_speed_mean: Mean proton speed from icme_start_time to mo_start_time, NaN if these times are similar. unit: km/s. Velocity sheath_speed_std sheath_speed_std: Standard deviation of proton speed from icme_start_time to mo_start_time, NaN if these times are similar. unit: km/s. Velocity sheath_density_mean sheath_density_mean: Mean proton density from icme_start_time to mo_start_time, NaN if these times are similar. unit: cm^-3. Other sheath_density_std sheath_density_std: Standard deviation of proton density from icme_start_time to mo_start_time, NaN if these times are similar. unit: cm^-3. Other sheath_pdyn_mean sheath_pdyn_mean: Mean proton dynamic pressure, from icme_start_time to mo_start_time, NaN if these times are similar. unit: nPa. Other sheath_pdyn_std sheath_pdyn_std: Standard deviation of proton dynamic pressure, from icme_start_time to mo_start_time, NaN if these times are similar. unit: nPa. Other