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New, improved version of generic mapping tools released
Paul Wessel,Walter H. F. Smith +1 more
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GMT allows users to manipulate (x,y,z) data, and generate PostScript illustrations, including simple x-y diagrams, contour maps, color images, and artificially illuminated, perspective, and/or shaded-relief plots using a variety of map projections.Abstract:
Version 31 of the Generic Mapping Tools (GMT) has been released More than 6000 scientists worldwide are currently using this free, public domain collection of UNIX tools that contains programs serving a variety of research functions GMT allows users to manipulate (x,y) and (x,y,z) data, and generate PostScript illustrations, including simple x-y diagrams, contour maps, color images, and artificially illuminated, perspective, and/or shaded-relief plots using a variety of map projections (see Wessel and Smith [1991] and Wessel and Smith [1995], for details) GMT has been installed under UNIX on most types of workstations and both IBM-compatible and Macintosh personal computersread more
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Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia
Sri Widiyantoro,Sri Widiyantoro,Endra Gunawan,Abdul Muhari,Nicholas Rawlinson,Jim Mori,Nuraini Rahma Hanifa,S. Susilo,Pepen Supendi,Hasbi Ash Shiddiqi,Andri Dian Nugraha,H.E Putra +11 more
TL;DR: To assess the expected inundation hazard, tsunami modeling was conducted based on several scenarios involving large tsunamigenic earthquakes generated by ruptures along segments of the megathrust south of Java, and support recent calls for a strengthening of the existing Indonesian Tsunami Early Warning System (InaTEWS).
Journal ArticleDOI
Frequency‐dependent landscape response to climatic forcing
TL;DR: In this paper, a Landscape Evolution Model (LEM) is used to systematically investigate the response of landscapes to a range of periodic oscillations in precipitation, and the resulting sediment-flux evolution displays a pronounced sensitivity to the period of the input precipitation signal, such that a specific periodicity maximizes the amplitude of the response.
Journal ArticleDOI
Lower-crustal earthquakes caused by magma movement beneath Askja volcano on the north Iceland rift
TL;DR: In this paper, a 20-seismometer survey of the Icelandic mid-Atlantic rift zone around the Askja volcano was conducted and the authors found 100 small-magnitude (ML < 1.5) earthquakes, occurring in swarms mostly at 14-26 km depth.
Journal ArticleDOI
Plate tectonic reconstructions and paleogeographic maps of the central and North Atlantic oceans1,2 1This article is one of a series of papers published in this CJES Special Issue on the theme of Mesozoic–Cenozoic geology of the Scotian Basin. 2Earth Sciences Sector Contribution 20120172.
TL;DR: In this paper, a new plate kinematic model of the central and North Atlantic oceans between North America, Africa, Meseta, Iberia, Flemish Cap, and Galicia Bank from Late Triassic to Late Cret...
Broadband seismic monitoring of active volcanoes using deterministic and stochastic approaches
Hiroyuki Kumagai,M. Nakano,Takuto Maeda,Hugo Yepes,P. Palacios,Mario Ruiz,S. Arrais,M. Vaca,Indira Molina,Tadashi Yamashina +9 more
Abstract: [1] We systematically used two approaches to analyze broadband seismic signals for monitoring active volcanoes: one is waveform inversion of very-long-period (VLP) signals assuming possible source mechanisms; the other is a source location method of long-period (LP) events and tremor using their amplitudes. The deterministic approach of the waveform inversion is useful to constrain the source mechanism and location but is basically only applicable to VLP signals with periods longer than a few seconds. The source location method assumes isotropic radiation of S waves and uses seismic amplitudes corrected for site amplifications. This simple approach provides reasonable source locations for various seismic signals such as a VLP event accompanying LP signals, an explosion event, and tremor associated with lahars and pyroclastic flows observed at five or fewer stations. Our results indicate that a frequency band of about 5–12 Hz and a Q factor of about 60 are appropriate for the determination of the source locations. In this frequency band the assumption of isotropic radiation may become valid because of the path effect caused by the scattering of seismic waves. The source location method may be categorized as a stochastic approach based on the nature of scattering waves. Systematic use of these two approaches provides a way to better utilize broadband seismic signals observed at a limited number of stations for improved monitoring of active volcanoes.
References
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Journal ArticleDOI
Free software helps map and display data
Paul Wessel,Walter H. F. Smith +1 more
TL;DR: The Generic Mapping Tools (GMT) is introduced, which is a free, public domain software package that can be used to manipulate columns of tabular data, time series, and gridded data sets and to display these data in a variety of forms ranging from simple x-y plots to maps and color, perspective, and shaded-relief illustrations.
Journal ArticleDOI
New version of the generic mapping tools
Paul Wessel,Walter H. F. Smith +1 more
TL;DR: GMT is a public domain collection of UNIX tools that contains programs to manipulate (x,y,z) data and to generate PostScript illustrations, including simple x-y diagrams, contour maps, color images, and artificially illuminated, perspective, shaded-relief plots using a variety of map projections.
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