Preliminary 1-second and 1-minute INTERMAGNET Eyrewell (EYR) data

Preliminary 1-second and 1-minute Eyrewell (EYR) data are submitted to INTERMAGNET in a standardized file format (IAGA-2002) every hour.

The data can be downloaded via a free web access provided by INTERMAGNET at http://www.intermagnet.org/data-donnee/download-eng.php (Data Type: ‘provisional’).

1-minute (Sample Rate: ‘minute’) ‘provisional’ EYR data are available since 1994.

1-second data (Sample Rate: ‘second’) ‘provisional’ EYR data are available since 2012.

Cite data as:

GNS Science. (2022). Preliminary 1-second and 1-minute data from Eyrewell (EYR) [Data set]. INTERMAGNET. https://doi.org/10.21420/APJY-5050

Purpose: GNS Science measures and monitors the magnetic field primarily as a contribution to the world scientific community but also to provide reference information for various kinds of magnetic surveys.

Observatories in New Zealand and Samoa provide the only continuous data from about a 90° arc of the Southern Hemisphere, one eighth of the globe.

GNS Science possesses a continuous reference series of geomagnetic measurements back to 1901 thereby enabling the identification of long term changes in Earth's magnetic field.

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GNS Science

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Other constraints: The data is made available through INTERMAGNET - the global network of observatories, monitoring the Earth's magnetic field. The data is provided for your own internal use only; it is not for commercial use, sale or distribution to third parties without the written permission of GNS Science. Publications making use of the data should include an acknowledgment statement as specified by INTERMAGNET.

GNS Science has made all reasonable endeavours to ensure the accuracy and completeness of the datasets but gives no warranties and makes no representations (express or implied) as to its accuracy, completeness or fitness for purpose, or title. GNS Science accepts no liability on account of errors in any of the information and each user must rely on its own inquiries. GNS Science excludes liability for any loss, damage or expense, direct or indirect and however caused, whether through negligence or otherwise resulting from any person, company or organisation's use of, or reliance on, these data. In no circumstances will GNS Science be liable for consequential, indirect, special or punitive damages. Use of the product will be deemed to be acceptance of these terms.

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GNS Science -

OnLine resource: New Zealand Geomagnetic Database ( WWW:LINK-1.0-http--link )
For more details go to the GNS Science website for the New Zealand Geomagnetic Database.

OnLine resource: INTERMAGNET ( WWW:LINK-1.0-http--link )
INTERMAGNET (International Real-time Magnetic Observatory Network) is a global network of cooperating digital magnetic observatories. Data are available as magnetograms or as digital data files that can be downloaded from a browser or by FTP. Downloaded data subject to INTERMAGNET Conditions of Use.

Statement: There was a succession of 3 observatories in or near Christchurch: the first was established in the Botanic Gardens (1901-1958; paper records), the second at Amberley (1916-1977; paper records), and the third at Eyrewell (1978-1995; paper records). In 1994 digital equipment was installed at Eyrewell allowing it to become an INTERMAGNET observatory.

Magnetic measurements began at Scott Base for the International Geophysical Year in 1957. GNS has paper records from 1957-1994. Scott Base became an INTERMAGNET observatory in 1996.

Magnetic measurements in Apia began in 1902. GNS has paper records from 1907-1994. In 1998 the installation of a digital system allowed Apia to become an INTERMAGNET observatory.

Real-time data is now sent to INTERMAGNET Geomagnetic Information Nodes within 72 hours of recording.