Surface velocity map of the Afar Rift Zone from 2014-19

This dataset contains a map of ground movements covering the Afar Rift Zone in Ethiopia, Eritrea, and Djibouti for the time period between October 2014 and August 2019. The Afar region is located where three tectonic plates are pulling apart, creating rift segments which are 50-100 km long. Surface deformation on these segments is not constant in time, with episodes of rifting occurring periodically and magma intrusions causing sudden ground movements. We use frequent Sentinel-1 satellite Interferometric Synthetic Aperture Radar (InSAR) observations to measure surface displacements through time across the whole region. We relate these to ground based Global Navigation Satellite Systems (GNSS) observations and combine data from different satellite tracks to produce maps of the average surface velocity in three directions (perpendicular to the rift zone, parallel to the rift zone, and vertical). The continued observation of these time-varying ground movements is important for understanding how continents break up, with data here providing evidence of how tightly focussed extension is around the rift segments and of the subsurface magma movement at several volcanic centres.

Default

Identification info

Metadata Language
English (en)
Dataset Reference Date ()
2021-09-29T09:40:39
Dataset Reference Date ()
2021-09-29T09:40:39
Identifier
https://catalogue.ceda.ac.uk/uuid/ac43cee2bf5e4942970492209ba95e49
Identifier
NERC EDS Centre for Environmental Data Analysis / ac43cee2bf5e4942970492209ba95e49
Identifier
doi / 10.5285/ac43cee2bf5e4942970492209ba95e49
  Unavailable - Moore, Chris ( author )
  Unavailable - Wright, Tim ( author )
  Unavailable - Hooper, Andrew ( author )
  NERC EDS Centre for Environmental Data Analysis - custodian
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
  NERC EDS Centre for Environmental Data Analysis - distributor
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
  Unavailable - Hooper, Andrew ( principal_investigator )
  NERC EDS Centre for Environmental Data Analysis - point_of_contact
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
  NERC EDS Centre for Environmental Data Analysis - publisher
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
Maintenance and update frequency
unknown
Update scope
dataset
Keywords
  • Sentinel-1
  • InSAR
  • GNSS
  • velocity
  • map
GEMET - INSPIRE themes, version 1.0 ()
  • orthoimagery
Limitations on Public Access
otherRestrictions
Other constraints
Public data: access to these data is available to both registered and non-registered users.
Use constraints
otherRestrictions
Other constraints
Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Spatial representation type
grid
Topic category
  • Imagery base maps earth cover
N
S
E
W


Begin date
2014-10-11T00:00:00
End date
2019-08-17T23:59:59
 
Code
WGS 84

Distribution Information

Data format
  • Data are netCDF formatted. ()

Resource Locator
CEDA Data Catalogue Page

Detail and access information for the resource

Resource Locator
DOWNLOAD

Download Data

Resource Locator
Related paper: Rift Focussing and Magmatism During Late-Stage Rifting in Afar C. Moore,T. J. Wright,A. Hooper, 2021

No further details.

Resource Locator
CEDA Data Catalogue Page

Detail and access information for the resource

Resource Locator
DOWNLOAD

Download Data

Resource Locator
Related paper: Rift Focussing and Magmatism During Late-Stage Rifting in Afar C. Moore,T. J. Wright,A. Hooper, 2021

No further details.

 
Quality Scope
dataset

Report

Dataset Reference Date ()
2010-12-08
Statement
Sentinel-1 Single Look Complex (SLC) data were sourced from the European Space Agency (ESA) Copernicus Hub, and processed using LiCSAR software (Lazecky et al., 2020). Processing and analysis was then performed by the authors (University of Leeds, COMET) in MATLAB to account for atmospheric effects, estimate uncertainties, create deformation time series and average velocity maps, reference surface velocities to the regional GNSS network (King et al., 2019), and convert velocities from the satellite look direction into rift-perpendicular and rift-parallel horizontal and vertical components. Final velocity maps and variance estimates were exported to NetCDF format for archiving. Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).

Metadata

File identifier
ac43cee2bf5e4942970492209ba95e49 XML
Metadata Language
English (en)
Character set
8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
Resource type
dataset
Metadata Date
2024-08-22T23:36:55
Metadata standard name
UK GEMINI
Metadata standard version
2.3
  NERC EDS Centre for Environmental Data Analysis
RAL Space , STFC Rutherford Appleton Laboratory, Harwell Campus , Didcot , OX11 0QX , United Kingdom
01235446432
 
 

Overviews

N
S
E
W



Publishing Body

Share on social sites

Access the portal

Associated resources (if any)

Not available