64001d13-098f-1e26-e054-002128a47908 English dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-04-06 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13607244 WGS 84 (EPSG::4326) Lake Tana Seistec Boomer Data (NERC Grant NER/B/S/2002/00540) 2018-01-18 creation http://data.bgs.ac.uk/id/dataHolding/13607244 This is Seistec Boomer data acquired on Lake Tana. If not familiar with this variant of standard Boomer, it has a line-in-cone. Dr Dei Huws Bangor University School of Ocean Sciences Menai Bridge Anglesey LL59 5AB not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/64001d13-098f-1e26-e054-002128a47908.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Seismic surveys BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data Citable Data dataCentre NERC_DDC otherRestrictions no limitations The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible. otherRestrictions 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. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation ISO 3166_1 alpha-2 2009 revision ET ISO 3166_1 alpha-3 2009 revision ETH British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation ETHIOPIA [id=692000] 37.0000 37.6500 11.5000 12.3500 2004-11-11 2004-11-14 SEG-Y witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item106249 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.1038/s41598-018-19601-w WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) information https://doi.org/10.5285/046d06dd-ecaf-4f4c-8ba1-2f0254549c5c WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Dei G Huws, B. U., Richard Bates, U. O. S. A. (2018). Lake Tana Seistec Boomer Data [Data set]. British Geological Survey. https://doi.org/10.5285/046d06dd-ecaf-4f4c-8ba1-2f0254549c5c information dataset dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false 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 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false The seismic survey was conducted using a surface-towed IKB Seistec boomer acquisition system, comprising a standard boomer plate combined with a line-in-cone hydrophone receiver arrangement, which is designed to reduce acoustic noise in a shallow water environment (Simpkin and Davis 1993). The system was powered by a 4 kV capacitor discharging power supply unit, and towed on the survey vessel’s aft quarter, in the relatively undisturbed water between the bow wave and the wake. A 200microsecond broadband pulse was produced at the boomer source, at an energy level of 180J and a repetition interval of 500ms. Survey speed was maintained at between 4 and 6kts with GPS positioning yielding location information typically to within 3-8m. Data were recorded in standard SEG-Y format with a record length of 150 ms and sampling interval of 16 micros.