Identification
Data Identification:
citation:
Citation:
Title: Aa Indices.
Date:
CI_Date:
date: 1868
Date Type: creation
Identifier:
RS_Identifier:
code: http://data.bgs.ac.uk/id/dataHolding/13480365
Abstract: The aa index is a simple global geomagnetic activity index, with units of 1 nT (nanotesla), which is produced from the K indices from two approximately antipodal observatories. At present these are Hartland observatory in the UK and Canberra observatory in Australia. The main advantage in using aa indices for research purposes is that the time series spans further back (to 1868) than any of the other planetary indices time series.Also, up to date values are produced and made available weekly, giving nearer to real time availability than any other planetary index. In between the weekly updates, BGS calculates estimated aa indices, providing real time "nowcasts" which are updated on an hourly basis. These estimates are clearly marked with the letters "Est". Although calculated by the same method, the aa indices available on this service are not the definitive values. These are published by the International Service for Geomagnetic Indices, CRPE/CNET - CNRS, 4 Avenue de Neptune, F-94107 Saint Maur, Cedex, France.
Descriptive Keywords:
Keywords:
keyword: http://www.eionet.europa.eu/gemet/concept?cp=13&langcode=en&ns=5
keyword: Geology
Thesaurus Name:
Citation:
Title: GEMET - INSPIRE themes
Date:
CI_Date:
date: 2008-06-01
Date Type: publication
Keywords:
keyword: Geomagnetism
Thesaurus Name:
Citation:
Title: BGS Thesaurus of Geosciences
Date:
CI_Date:
date: 2011
Date Type: revision
Keywords:
keyword: NERC_DDC
Graphic overview:
Browse Graphic:
File Name: https://resources.bgs.ac.uk/images/geonetworkThumbs/9df8df51-63b9-37a8-e044-0003ba9b0d98.png
Point of Contact:
Responsible Party:
Organisation Name: British Geological Survey
Contact Info:
CI_Contact:
phone:
CI_Telephone:
voice: +44 131 667 1000
Address:
Address:
Delivery Point: The Lyell Centre, Research Avenue South
city: EDINBURGH
administrative Area: LOTHIAN
Postal Code: EH14 4AP
country: United Kingdom
e-mail: enquiries@bgs.ac.uk
role: originator
Responsible Party:
Organisation Name: British Geological Survey
Contact Info:
CI_Contact:
phone:
CI_Telephone:
voice: +44 131 667 1000
Address:
Address:
Delivery Point: The Lyell Centre, Research Avenue South
city: EDINBURGH
administrative Area: LOTHIAN
Postal Code: EH14 4AP
country: United Kingdom
e-mail: enquiries@bgs.ac.uk
role: pointOfContact
Responsible Party:
Organisation Name: British Geological Survey
Contact Info:
CI_Contact:
phone:
CI_Telephone:
voice: +44 115 936 3100
facsimile: +44 115 936 3276
Address:
Address:
Delivery Point: Environmental Science Centre,Keyworth
city: NOTTINGHAM
administrative Area: NOTTINGHAMSHIRE
Postal Code: NG12 5GG
country: United Kingdom
e-mail: enquiries@bgs.ac.uk
role: distributor
Resource Maintenance:
MD_MaintenanceInformation:
maint. / update frequency: weekly
Resource Constraints:
MD_LegalConstraints:
Use Limitation: Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk) for advice, should the position not be clear.
Access Constraints: otherRestrictions
Other Constraints: http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/INSPIRE_Directive_Article13_1d
Other Constraints: In its role as World Data Centre for Geomagnetism (Edinburgh) we make available the data for scientific research. If the data are used in publications and presentations, the data suppliers and this WDC should be acknowledged. For commercial applications of these data, please contact the relevant institute directly.
MD_LegalConstraints:
Use Constraints: otherRestrictions
Other Constraints: The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Other Constraints: Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk) for advice, should the position not be clear.
Spatial Representation Type: notApplicable
language: eng
topicCategory: geoscientificInformation
Extent:
Extent:
Geographic Element:
Geographic Bounding Box:
westBoundLongitude: -180.0000
eastBoundLongitude: 180.0000
southBoundLatitude: -90.0000
northBoundLatitude: 90.0000
Geographic Description:
Geographic Identifier:
RS_Identifier:
authority:
Citation:
Title: British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus
Date:
CI_Date:
date: 1979
code: WORLD [id=100000]
Temporal Element:
TemporalExtent:
extent:
begin / end:
begin: 1868
Supplemental Information: Complete time Series. Global: Derived from 2 Antipodal Locations.
Distribution
Distribution:
Transfer Options:
Digital Transfer Options:
onLine:
CI_OnlineResource:
linkage: http://www.geomag.bgs.ac.uk/data_service/data/magnetic_indices/aaindex.html
function: information
Distribution Format:
Format:
Format Name: DELIMITED ASCII - ASCII Year Files or user defined.
Distributor:
Distributor:
Distributor Contact:
Responsible Party:
Organisation Name: British Geological Survey
Contact Info:
CI_Contact:
phone:
CI_Telephone:
voice: +44 115 936 3100
facsimile: +44 115 936 3276
Address:
Address:
Delivery Point: Environmental Science Centre,Keyworth
city: NOTTINGHAM
administrative Area: NOTTINGHAMSHIRE
Postal Code: NG12 5GG
country: United Kingdom
e-mail: enquiries@bgs.ac.uk
role: distributor
Data Quality
Data Quality:
Lineage:
LI_Lineage:
statement: The aa indices are derived using data from two nearly antipodal observatories, where magnetograms were available since 1868. For each three hour interval, K indices are measured at the two stations and converted back into amplitude; an individual aa index is the average of the northern and southern values, weighted to account for the small difference in latitude of the two stations, or for the slight changes in the very place of the observatory. The definitive values are published by the International Service for Geomagnetic Indices.
Scope:
DQ_Scope:
level: dataset
Level Description:
MD_ScopeDescription:
other: dataset
Report:
Domain Consistency:
Result:
Conformance Result:
specification:
Citation:
Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
Date:
CI_Date:
Date Type: publication
date: 2011
explanation: See the referenced specification
pass: 0
Domain Consistency:
Result:
Conformance Result:
specification:
Citation:
Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Date:
CI_Date:
Date Type: publication
date: 2010-12-08
explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
pass: 0
Reference System
MD_ReferenceSystem:
referenceSystemIdentifier:
RS_Identifier:
authority:
Citation:
Title: www.epsg.org
Date:
CI_Date:
Date Type: revision
date: 2005
code: GLOC
Code Space: OGP
Metadata
File Identifier: 9df8df51-63b9-37a8-e044-0003ba9b0d98
language: eng
Resource type: dataset
Metadata Contact:
Responsible Party:
Individual Name: Clarke,Ellen
Organisation Name: British Geological Survey
Position Name: NERC-BGS Scientist Geomagnetism
Contact Info:
CI_Contact:
phone:
CI_Telephone:
voice: +44 131 667 1000
Address:
Address:
Delivery Point: The Lyell Centre, Research Avenue South
city: EDINBURGH
administrative Area: LOTHIAN
Postal Code: EH14 4AP
country: United Kingdom
e-mail: enquiries@bgs.ac.uk
role: pointOfContact
Date Stamp: 2020-07-10
Metadata Standard Name: UK GEMINI
Metadata Standard Version: 2.3
Dataset URI: http://data.bgs.ac.uk/id/dataHolding/13480365