Earthquake Report: 2015 Summary M GT 7

Here I summarize the global seismicity for 2015. I limit this summary to earthquakes with magnitude greater than or equal to M 7.0. I reported on all but one of these earthquakes.

    I include summaries of my earthquake reports in sorted into three categories. One may also search for earthquakes that may not have made it into these summary pages (use the search tool).

  • Magnitude
  • Region
  • Year

Annual Summary Poster

Here is the map where I show the epicenters as white circles. I also plot the USGS moment tensors for each earthquake, with arrows showing the sense of motion for each earthquake.
I placed a moment tensor / focal mechanism legend in the lower left corner of the map. There is more material from the USGS web sites about moment tensors and focal mechanisms (the beach ball symbols). Both moment tensors and focal mechanisms are solutions to seismologic data that reveal two possible interpretations for fault orientation and sense of motion. One must use other information, like the regional tectonics, to interpret which of the two possibilities is more likely.
In some cases, I am able to interpret the sense of motion for strike-slip earthquakes. In other cases, I do not know enough to be able to make this interpretation (so I plot both solutions).

  • 2015.07.18 Santa Cruz Islands

  • 2015.07.27 New Guinea

  • 2015.07.27 New Guinea update #1 updated interpretation
  • 2015.07.27 New Guinea update #2 animations and seismic records

  • Compilation Map from here

  • 2015.09.16 Illapel, Chile

  • 2015.09.16 Illapel, Chile update #1 new maps and tsunami data
  • 2015.09.16 Illapel, Chile update #2 tsunami observations
  • 2015.09.16 Illapel, Chile update #3 more tsunami observations
  • 2015.09.16 Illapel, Chile update #4 historic tsunami comparisons
  • 2015.09.16 Illapel, Chile update #5
    • First Map

    • Second Map

    • Third Map (made in November 2015 following a M 6.8 earthquake). Here is the first report and the second report for that M 6.8 earthquake.

    • Regional Historic Earthquake Comparison Map #1

    • Large Scale Historic Earthquake Comparison Map

    • Regional Historic Earthquake Comparison Map #2 (from here)

    • Historic Tsunami Comparisons
      • Here are the NOAA Center for Tsunami Research websites for the three tsunamis plotted in the map below, plus the one from 2015.09.16 not shown on the map below.

      • 1960.05.22 M 9.5 (There is no page for the 1960 earthquake, so this map is located on the 2010 page.)/li>
      • 2010.02.27 M 8.8
      • 2014.04.01 M 8.2
      • 2015.09.16 M 8.3

      Here is the map. These three maps use the same color scale. There is not yet a map with this scale for the 2015 tsunami, so we cannot yet make the comparison.

      Here is an animation of these three tsunami from the US NWS Pacific Tsunami Warning Center (PTWC). This is the YouTube link.

  • 2015.10.20 Vanuatu

  • 2015.10.26 Afghanistan

  • 2015.10.26 Afghanistan update #1
  • Global Map

  • Local Map

  • 2015.11.18 Solomon Islands

  • 2015.11.24 Peru

  • 2015.11.24 Peru update #1

    • Updated Map

  • 2015.11.24 Argentina/Brazil
  • 2015.12.04 Southeast Indian Ridge

  • 2015.12.07 Tajikistan

    • References:

    • See Earthquake Reports for the references in the maps from those individual earthquakes.

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