Preliminary 1-second and 1-minute Geomagnetic Observatory data

Continuous data recorded by New Zealand's Geomagnetic Observatories EYR, SBA & API, processed at 1-minute and 1-second sampling, and submitted to INTERMAGNET in a standardized file format (IAGA-2002) every hour. The data are preliminary as they are, in contrast to definitive data, submitted without being cleaned (spikes removed) and baseline (absolute values) corrected.


The preliminary 1-minute data are more timely and potentially more complete than the definitive 1-minute data, whereas the 1-minute definitive data goes through a data quality reviewing process with data recorded in one year not being published until the following year. There are no 1-second definitive data being produced.


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 data (Sample Rate: ‘minute’): EYR available since 1994, SBA since 1996, and API since 1999.

1-second data (Sample Rate: ‘second’): EYR data available since 2012, SBA since 2012, and API since 2012.

Simple

Date (Revision)
2020-09-01
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.
Status
On going
Point of contact
Organisation name Individual name Electronic mail address Role

GNS Science

geomag@gns.cri.nz

Point of contact
Maintenance and update frequency
Continual
Keywords

  • Geomagnetism

  • Magnetic fields

  • Magnetic anomalies

  • Amberley Observatory

  • Eyrewell Magnetic Observatory

  • New Zealand

  • Samoa

  • Scott Base

  • Antarctica

  • Magnetic recording

  • Christchurch Magnetic Observatory

  • Temporal variation
Use constraints
Copyright
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.
Classification
Unclassified
Language
English
Topic category
  • Geoscientific information
N
S
E
W
thumbnail


Begin date
1902-01-01
Distribution format
Name Version

IAGA2002

2002
Distributor contact
Organisation name Individual name Electronic mail address Role

GNS Science

datamanagement@gns.cri.nz

Point of contact
OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

 		https://www.gns.cri.nz/Home/Our-Science/Land-and-Marine-Geoscience/Earth-s-Magnetic-Field/New-Zealand-Geomagnetic-Database

New Zealand Geomagnetic Database
OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

 		https://intermagnet.github.io/

INTERMAGNET
Hierarchy level
Dataset
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.

Metadata

File identifier
097c0f37-ac9a-45cb-9cfa-1bec4c67fd16 XML
Metadata language
English
Character set
UTF8
Parent identifier

56c42b24-b93d-46d1-8e7a-4e0a1051881f
Hierarchy level
Dataset
Hierarchy level name

Dataset
Date stamp
2024-10-22T22:35:03.897777Z
Metadata standard name

ISO 19115:2003/19139
Metadata standard version

1.0
Metadata author
Organisation name Individual name Electronic mail address Role

GNS Science

datamanagement@gns.cri.nz

Point of contact
 
 

Overviews

overview
Absolute magnetic hut located in Christchurch Botanical Gardens circa 1910-1926

Spatial extent

N
S
E
W
thumbnail


Keywords


Provided by

Access to the catalogue