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L. Svalgaard's Interplanetary Sector Boundary Crossing List

(2022). L. Svalgaard's Interplanetary Sector Boundary Crossing List. [Data set]. Leif Svalgaard, Stanford University. https://doi.org/10.48322/b9m5-f869. Accessed on .

Note: Proper references, including or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/Catalog/Svalgaard/Sector.Boundary.Crossing

Description
This list of interplanetary sector boundary crossings, now spanning 1926-2011, has been compiled by Leif Svalgaard from ground magnetometer data and in situ interplanetary magnetic field observations Identification of the boundaries is discussed at the "InformationURL" given below. For each crossing, the day of crossing, the direction of crossing (+to- or -to+) and the durations (in whole days) of single-polarity intervals on either side of the crossing are given. As of early 2012, the list was being kept current.

Metadata Rights
CC0-1.0: Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.

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Details

Version:2.7.1

Catalog

ResourceID
spase://NASA/Catalog/Svalgaard/Sector.Boundary.Crossing
NamingAuthority
NASA
ResourceType
Catalog
ResourceHeader
ResourceName
L. Svalgaard's Interplanetary Sector Boundary Crossing List
DOI
https://doi.org/10.48322/b9m5-f869
ReleaseDate
2026-02-02 13:10:26Z
RevisionHistory
RevisionEvent
ReleaseDate
2023-05-11 12:34:56.789
Note
Updated to SPASE Version 2.5.0 if needed, Added DOI information, JMW
RevisionEvent
ReleaseDate
2026-02-02 13:10:26Z
Note
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
Description
This list of interplanetary sector boundary crossings, now spanning 1926-2011, has been compiled by Leif Svalgaard from ground magnetometer data and in situ interplanetary magnetic field observations Identification of the boundaries is discussed at the "InformationURL" given below. For each crossing, the day of crossing, the direction of crossing (+to- or -to+) and the durations (in whole days) of single-polarity intervals on either side of the crossing are given. As of early 2012, the list was being kept current.
Acknowledgement
Leif Svalgaard for creating and maintaining this event list
PublicationInfo
Authors
Leif Svalgaard
PublicationDate
2022-01-01 00:00:00
PublishedBy
Leif Svalgaard, Stanford University
Contacts
Role Person StartDate StopDate Note
1. DataProducer spase://SMWG/Person/Leif.Svalgaard
InformationURL
Name
SB event list introductory page
URL
http://wso.stanford.edu/SB/SB.html
Description
Link to Svalgaard and other sector boundary crossing lists
PriorIDs
spase://VSPO/Catalog/Svalgaard_SB_List
spase://VSPO/Catalog/Svalgaard/Sector.Boundary.Crossing
AccessInformation
RepositoryID
spase://SMWG/Repository/WSO
Availability
Online
AccessRights
Open
AccessURL
Name
Sector boundary crossing list
URL
https://www.leif.org/research/sblist.txt
Format
Text
PhenomenonType
SectorBoundaryCrossing
TimeSpan
StartDate
1926-01-29 00:00:00
RelativeStopDate
-P1M
Note
As of 2/8/2012, last SB crossing was for 1/25/2012
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Contact SPDF: NASA-SPDF Feedback/Support
Responsible NASA Official: Robert M. Candey
Site Editor: Tami Kovalick
SPDF ROR ID
SPDF re3data ID
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Last Updated: 2026-02-02