Rayleigh wave phase delays and Vsv upper-mantle structure in the Pacific

This repository contains data and inversion results for the SOLA finite-frequency tomography of the Pacific upper-mantle. It is linked to the paper by Latallerie et al., in prep, which follows one from the synthetic tomography paper (Latallerie et al., 2025, Seismica), which both provide more information. The code repository for the finite-frequency SOLA tomography can be found at Gitlab: https://gitlab.com/FranckLatallerie/sola_ffsw.git The dataset consists of Rayleigh wave phase delays (dispersion) measured on vertical component seismograms for earthquake-receiver pairs across the Pacific hemisphere. Phase delays are measured using synthetic reference seismogram computed with normal-mode summation using the MINEOS software (e.g. Masters et al., 2011) in the radial reference model stw105 (Kustowski et al., 2008). Observed seismograms were downloaded from the Earthscope (formerly IRIS) Data Management Center (IRIS DMC, 2012). All network and stations used are listed in the Acknowledgements of the README file. The model represents the vertically polarised shear wave velocity (Vsv) 3D structure of the upper mantle in the Pacific. It is accompanied by full 3D resolution and uncertainty. The 3D tomographic grid is made of voxels of size 2 by 2 degrees laterally, and 25 km vertically, spanning the whole sphere, starting at the surface down to ~400km depth. In the files, the longitude is the fastest varying coordinate, then latitude, followed by radius. The midpoints of the voxels range between 1 and 359 for longitude and between 89 (north) to -89 (south) for latitude, both in steps of 2 degrees, while radius changes from 6358.5 to 5983.5 km inclusive, in steps of 25 km.

Date (Creation): 2025-04-11

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13608405

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Oxford	Paula Koelemeijer	not available	Originator
University of Oxford	Franck Latallerie	not available	Originator
University of Oxford	Andrew Walker	not available	Originator
EOST / CNRS Strasbourg	Sophie Lambotte	not available	Originator
EOST / CNRS Strasbourg	Alessia Maggi	not available	Originator
EOST / CNRS Strasbourg	Christophe Zaroli	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency: notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Citable Data
Seismology
Seismic tomography
NGDC Deposited Data
Surface waves

dataCentre

Keywords

NERC_DDC

Access constraints: Other restrictions

Other constraints: restricted

Other constraints: The dataset has been formally approved by BGS for access by external clients under a BGS Digital Data Licence, issued via BGS's IPR Section. The dataset must not be provided to, or be accessible by, an external client until the IPR Section confirms that signed licence documentation is in place. Refer to the IPR Section (DigitalLE@bgs.ac.) if further advice is required.. Constraint applies until 2026-07-31

Use constraints: Other restrictions

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.

Language: English

Topic category

Geoscientific information

Geographic identifier: PACIFIC OCEAN [id=2002258]
British Geological Survey Gazetteer: Gazetteer of sea areas 2010 revision

Begin date: 2023-02-01

End date: 2024-07-31

Unique resource identifier: WGS 84 (EPSG::4326)

Distribution format

Name	Version
ASCII plain text files

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item187920	Data

Hierarchy level: Dataset

Other: dataset

Conformance result

Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

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 (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: Data are measured using the multi-taper technique (Thompson 1982) between frequencies of 6 to 21 mHz, in steps of 1mHz. The first 5 Slepians are used (Slepian 1978). A datum is the average of measurements over the 5 tapers, and while the standard deviation represents the uncertainty. The tomographic model is developed by applying the SOLA inverse method (Zaroli 2016) to the data using finite-frequency theory (Zhou 2009).