Category:Geomagnetic Observations

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Main contacts

TCS Contact: Main Contact: Pavel Hejda

Alternate/Proxy: Alan Thomson

ICS contact: Main Contact: Simon Flower

Service EGMODA: Simon Flower

Service ESGI: Aude Chambodut

Service EMTDAMO: Maxim Smirnov

Services and Corresponding DDSS

EGMODA - European Geomagnetic Models and Data Archives

DDSS-001 Geomagnetic Observatory Data

DDSS-002 Variometer Data

DDSS-003 Magnetic Surveys

DDSS-005 Historical Magnetic Data

DDSS-012 Global Main Magnetic Field Models (IGRF and WMM)

DDSS-014 European regional magnetic model (MagNetE)

DDSS-015 Global Crustal Magnetic Field Model (World Digital Magnetic Anomaly Map)

ESGI - European Service of Geomagnetic Indices

DDSS-006 Geomagnetic Indices

index aa
Type Time Series
Spatial coverage Planetary (one single value for the planet)
Temporal coverage from 1868-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive "D" then Provisional "P" then Quick-look "Q")
Time resolution: 3-hour (UT) interval
Name of Files aa_YYYY-MM-DD_YYYY-MM-DD_T.dat (where YYYY is year - 4 digits; MM is month - 2 digits; DD is day - 2 digits; T is Data File Quality - Definitive "D" or Provisional "P" or Quick-look "Q")
Format of files ASCII with an header (which each line ends by pipe character)
DATE / TIME /DayOfYear / aa(nT) / Kpa (K unit) / Aa (nT) / CK24 / CK48
Plot format to be implemented by ICS (TU Time = Column 1 DATE & 2 TIME ) VS (Value of the index in nT = Column 4 aa)
index am
Type Time Series
Spatial coverage Planetary and hemispheric
Temporal coverage from 1959-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive D then Provisional P then Quick-look Q)
Time resolution: 3-hour (UT) interval
Name of Files am_YYYY-MM-DD_YYYY-MM-DD_T.dat (where YYYY is year - 4 digits; MM is month - 2 digits; DD is day - 2 digits; T is Data File Quality - Definitive "D" or Provisional "P" or Quick-look "Q")
Format of files ASCII with an header (which each line ends by pipe character)
DATE / TIME /DayOfYear / am (in nT) / Kpm / an (in nT) / as (in nT) / Am / An / As
Plot format to be implemented by ICS (TU Time = Column 1 DATE & 2 TIME) VS (Value of the planetary index in nT = Column 4 am)
(TU Time = Column 1 DATE & 2 TIME) VS (Value of the northern hemisphere index in nT = Column 6 an)
(TU Time = Column 1 DATE & 2 TIME) VS (Value of the southern hemisphere index in nT = Column 7 as)


index Kp
Type Time Series
Spatial coverage Planetary
Temporal coverage from 1932-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive D then Quick-look Q)
Time resolution: 3-hour (UT) interval
Name of Files Kp_YYYY-MM-DD_YYYY-MM-DD_T.dat (where YYYY is year - 4 digits; MM is month - 2 digits; DD is day - 2 digits; T is Data File Quality - Definitive "D" or Quick-look "Q")
Format of files ASCII with an header (which each line ends by pipe character)
DATE / TIME /DayOfYear / Kp / ap(in nT) / Ap / Cp / C9 / BSRN / NdB
Plot format to be implemented by ICS (TU Time = Column 1 DATE & 2 TIME) VS (Value of the index in nT = Column 5 ap)

DDSS-007 Geomagnetic Events

events SSC Sudden Commencement
Type Date & Time List (Events)
Spatial coverage Planetary
Temporal coverage from 1869-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive D then Provisional P)
Name of Files SSC_YYYY_T.dat (where YYYY is year - 4 digits; T is Data File Quality - Definitive "D" or Provisional "P")
Format of files ASCII with an header which each line in showing a pipe character
DATE / TIME / DayOfYear / MDUR / MAMP / CODES / TYPE / OBSERVATORIES / DURATION / AMPLITUDE
Plot format to be implemented by ICS Vertical line at (TU Time = Column 1 DATE & 2 TIME)


events SFE Solar Flare Event
Type Date & Time List (Events)
Spatial coverage Planetary
Temporal coverage from 1986-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive D then Provisional P)
Name of Files SFE_YYYY_T.dat (where YYYY is year - 4 digits; T is Data File Quality - Definitive "D" or Provisional "P")
Format of files ASCII with an header which each line in showing a pipe character
DATE / TIME / DayOfYear / OBSERVATORIES / QUALIFICATION
Plot format to be implemented by ICS Vertical line at (TU Time = Column 1 DATE & 2 TIME)
events QDdays Monthly Quietest and Most Disturbed days
Type Date
Spatial coverage Planetary
Temporal coverage from 1932-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive D then Quick-Look Q)
Name of Files SSC_YYYY_T.dat (where YYYY is year - 4 digits; T is Data File Quality - Definitive "D" or Provisional "P")
Format of files ASCII with an header which each line in showing a pipe character
DATE / TIME / DayOfYear / DAYS (Q or D)
Plot format to be implemented by ICS at (TU Time = Column 1 DATE) to display a red shaded area for Disturbed day = column 4 with a D
at (TU Time = Column 1 DATE) to display a green shaded area for quietest day = column 4 with a Q
A progression in the color from dark red to ligth red may be applied for disturbed days as a function of the number following the D character of column 4, and the same for the quietest days with a progression in the green color.


events CKdays quietest days over 24 or 48 hours
Type Date
Spatial coverage Planetary
Temporal coverage from 1868-01-01 onwards
Temporal Coverage constrained number and Data Files Quality contained in Archive. (From Old Times to recent Ones: Definitive D then Provisional P)
Format of files ASCII with an header which each line in showing a pipe character
DATE / TIME / DayOfYear / CK24 / CK48
Plot format to be implemented by ICS at (TU Time = Column 1 DATE) to display a 24h UT (centered onto noon) dark green area for really Quiet day over 24 hours = column 4 with a C
at (TU Time = Column 1 DATE) to display a 24h UT (centered onto noon) ligth green area for Quiet day over 24 hours = column 4 with a K
at (TU Time = Column 1 DATE) to display a 48h UT (centered onto noon, so from D-1 noon up to D+1 noon) dark green area for Really Quiet day over 48 hours = column 5 with a C
at (TU Time = Column 1 DATE) to display a 48h UT (centered onto noon, so from D-1 noon up to D+1 noon) ligth green area for Quiet day over 48 hours = column 5 with a K

DDSS-008 Electrojet Indices

DDSS-009 Substorm Events

DDSS-011 Ground Variations

EMTDAMO - European Magneto-Telluric Data and Models

DDSS-004 Magnetotelluric Time-Series

DDSS-010 Magnetotelluric Transfer Functions

DDSS-013 Lithospheric Conductivity Models

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