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Tag: Seismicity

Earthquake distribution map (poster)

Global map of seismicity showing the distribution of large 5.8+ magnitude historic earthquakes derived from seismic wave measurements.

Global map of seismicity showing the distribution of large 5.8+ magnitude historic earthquakes derived from seismic wave measurements after the compilation by Hayes (2018). Shown are individual epicentres coloured by depth. For individual earthquake maps see: s-ink.org/historic-earthquake-distribution .

The Scientific colour map ‘oslo‘ is used to represent earthquake depth accurately and to all readers.

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  • Perceptually uniform colour map
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Subduction earthquakes (crosssection)

Vertical crosssection through the Japan subduction zone highlighting large, subduction-related earthquakes recorded over the last decades and the spatial distribution of their hypocentres.

Vertical crosssection through the Japan subduction zone highlighting large, subduction-related earthquakes recorded by USGS over the last decades and the spatial distribution of their hypocentres, which outlines the downgoing plate and the single-sided nature of subduction zones on the Earth.

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Seismic hazard

Seismic hazard maps presenting the level of certain ground motions that have a 10% chance of exceedance during a 50-year time span.

Seismic hazard maps presenting the level of certain ground motions that have a 10% chance of exceedance (or a 90% chance of non-exceedance) during a 50-year time span (corresponding to a return period of 475 years). The seismic hazard data shown from Giardini et al. (2003) describes the peak ground acceleration. The Scientific colour map ‘bilbao‘ is used to represent data accurately and to all readers.

  • Creator: Fabio Crameri
  • This version: 15.12.2021
  • License: Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
  • Specific citation: This graphic by Fabio Crameri is available via the open-access s-Ink repository.
  • Related reference: Giardini, D., Grünthal, G., Shedlock, K. M. and Zhang, P.: The GSHAP Global Seismic Hazard Map. In: Lee, W., Kanamori, H., Jennings, P. and Kisslinger, C. (eds.): International Handbook of Earthquake & Engineering Seismology, International Geophysics Series 81 B, Academic Press, Amsterdam, 1233-1239, 2003.
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  • Colour-vision deficiency friendly
  • Readable in black&white
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Seismic wave travel paths

A schematic highlighting the travel paths of seismic waves through the Earth’s interior.

A schematic highlighting the travel paths of seismic waves through the Earth’s interior. Seismic waves travelling through the Earth follow a curving path due to changes in composition, pressure, and temperature within the layers of the Earth. They follow the same laws of refraction and reflection at interfaces as others waves. When they encounter boundaries between different media, the waves behave according to Snell’s law, with the resulting angle of refraction across the boundary depending on the velocity difference between the two media. Seismic wave arrivals, and the lack of arrivals of direct S- and P-waves, at distant seismic stations have taught us that there are multiple layers within the Earth.

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Historic earthquake distribution

Global distribution map of large 5.8+ magnitude historic earthquakes derived from seismic wave measurements.

Global map showing the distribution of large 5.8+ magnitude historic earthquakes derived from seismic wave measurements after the compilation by Hayes (2018). Shown are individual epicentres coloured by depth. For a nice looking poster graphic, see s-ink.org/earthquake-distribution-map-poster .

The Scientific colour map ‘oslo‘ is used to represent earthquake depth accurately and to all readers.

  • Alternative map projections
  • Transparent background
  • Light & dark background versions
  • Perceptually uniform colour map
  • Colour-vision deficiency friendly
  • Readable in black&white
Download

Faulty or missing link? – Please report them via a reply below!

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