![]() The following map was part of the material supplementing the publication showing the results of the analysis shown on an equal population projection. In a paper for the Journal of Maps published in 2014 I have analysed and visualised data documenting earthquakes that have occurred since 2150 BC. The vulnerability of populations depends on a multitude of factors that go beyond the actual earthquake’s magnitude.Ĭontinue reading → Posted in publications | Tagged cartogram, earthquake, earthquakes, europe, geographical, geology, gridded cartogram, hazard, seismic activity Earthquake risk zones: A people’s perspective Featured Moderate earthquakes in very densely populated regions can have a major impact. To fully consider that hazards do not only reflect the mere occurrence of major seismic events, but also the damage they create, the model also factors in the earthquakes’ damaging effects. Seismic hazard data collected for this model consisted of records from more than 30,000 earthquakes with a magnitude of 3.5 and above on the Richter scale which occurred since the year 1000, as shown in the smaller map in this feature. The model, published in 2013, overcomes the limitation of national borders and includes a thorough quantification of the uncertainties. As part of this collaborative initiative, the EU-funded SHARE (‘Seismic Hazard Harmonization in Europe’) project helped in generating the first consistent regional seismic hazard model for Europe (including Turkey). The Global Earthquake Model initiative aims to become the world’s most complete source of earthquake risk resources and works towards a globally accepted standard for risk assessment. Caption by Michon Scott.A deeper understanding and better communication of earthquake risk has been a major challenge in geosciences for a long time. NASA Earth Observatory image created by Jesse Allen, using earthquake and plate tectonics data from the USGS Earthquake Hazard Program, elevation data from the Shuttle Radar Topography Mission (SRTM) provided by the University of Maryland’s Global Land Cover Facility, and ocean bathymetry data from the British Oceanographic Data Center’s Global Bathmetric Chart of the Oceans (GEBCO). The New Britain region is seismically active and experiences both earthquakes and frequent volcanic activity. The USGS indicated that the 6.9 quake likely occurred within the subducting Solomon Sea Plate. ![]() The foreshock occurred at a greater depth and resulted from reverse faulting. The USGS reported that the 7.3 quake occurred roughly 10 kilometers (6 miles) to the north and 30 minutes after a 6.9-magnitude quake. The Solomon Plate pushes under the Bismarck Plate and dips to the north-northwest. Where the earthquake occurred, the Solomon Sea Plate grinds roughly northward in relation to the South Bismarck Plate at about 120 millimeters (a little less than 5 inches) per year. The two largest quakes appear very close to each other.Īccording to the USGS summary of the event, the 7.3-magnitude quake on July 18 likely resulted from thrust faulting on or near the boundary between two microplates: the Solomon Sea Plate and the South Bismarck Plate. Circles indicate earthquakes, and larger circles with thicker borders indicate greater magnitudes. Faults and approximate plate boundaries appear as red lines. In water and on land, colors lighten with height, so shallow depths and high peaks are pale. This color-coded map shows the topography, bathymetry, fault lines, and earthquake locations for the region. The two largest quakes had magnitudes of 7.3 and 6.9. Multiple earthquakes occurred in the region of Papua New Guinea’s New Britain on July 18–19, 2010, according to the U.S.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |