Earthquakes and Plate Tectonics Scientists have long recognized that the distribution of earthquakes around the world is

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Earthquakes And Plate Tectonics Scientists Have Long Recognized That The Distribution Of Earthquakes Around The World Is 1 (55.88 KiB) Viewed 157 times

Earthquakes And Plate Tectonics Scientists Have Long Recognized That The Distribution Of Earthquakes Around The World Is 2 (140.35 KiB) Viewed 157 times

Earthquakes and Plate Tectonics Scientists have long recognized that the distribution of earthquakes around the world is not random. Before plate tectonics was widely accepted, it was difficult to explain the processes that generate large (>7.0 magnitude) earthquakes. Once geologists understood the forces acting along plate boundaries, it became apparent that most of the world's largest earthquakes are associated with convergent or transform fault plate boundaries. In the following exercise, you will plot the locations of major earthquakes listed in Table 1 (below) on a world map (Figure 10, provided separately) that also contains plate boundaries. Once you have plotted these earthquakes, use Figure 10 to identify the type of plate boundary and complete the questions to the right.
Date UTC 1960 05 22 9.5 1964 03 28 9.2 2004 12 26 9.1 2011 03 11 9.0 1952 11 04 9.0 2010 02 27 8.8 1906 01 31 8.8 1965 02 04 8.7 2005 03 28 8.6 1950 08 15 8.6 2012 04 11 8.6 1957 03 09 8.6 2007 09 12 8.5 1938 02 01 8.5 1923 02 03 8.5 1922 11 11 8.5 1963 10 13 8.5 Table 1: locations of large earthquakes. Long. Reference -38.29 -73.05 Kanamori, 1977 61.02 -147.65 Kanamori, 1977 3.30 95.78 Park et al., 2005 38.322 142.369 PDE 52.76 160.06 -35.846 -72.719 -81.5 178.50 97.01 96.5 93.063 -175.39 101.367 131.62 161.0 -70.50 149.6 Magnitude Lat. 1.0 51.21 2.08 28.5 2.311 51.56 -4.438 -5.05 54.0 -28.55 44.9 Kanamori, 1977 PDE Kanamori, 1977 Kanamori, 1977 PDE Kanamori, 1977 PDE Johnson et al., 1994 PDE Okal and Reymond, 2003 Kanamori, 1988 Kanamori, 1977 Kanamori, 1977
20⁰º 40° San Andreas Fault Tropic of Cancer 40° COCOS PLATE PACIFIC OCEAN PACIFIC PLATE 80° 160 140 120 100° 80° NORTH AMERICAN PLATE NAZCA PLATE Volcanoes Mid-Atlantic Ridge Earthquake zone CARIBBEAN PLATE ROBINSON PROJECTION 60° 40° ATLANTIC OCEAN SOUTH AMERICAN PLATE 20⁰° Subduction zone Motion of plate 0° 20 ●. Tropic of Capricorn AFRICAN PLATE Antarctic Circle ANTARCTIC PLATE 40° 60° 0 80° 100 120 140 160° EURASIAN PLATE 1500 Collision zone Equator INDIAN Hot spots (present locations) OCEAN Liaoning Province ㅏ 0 1500 3000 KILOMETERS 80 INDO-AUSTRALIAN PLATE 3000 MILES 40° PHILIPPINE PLATE 1 PACIFIC 4 I by transform faults Kermadec-Tonga . Trench Spreading ridge offset OCEAN PACIFIC PLATE 20 FIJIO PLATE 20%
After plotting the location of earthquakes on Fig. 10, select the earthquakes below that occur close to the Eurasian/Pacific plate boundary. 2010-02-27 1965-02-04 1922-11-11 1957-03-09 1938-02-01 2007-09-12 2005-03-28 1963-10-13 1960-05-22 2004-12-26 1906-01-31 2011-03-11 2012-04-11 1950-08-15 1952-11-04 1964-03-28
After plotting the location of earthquakes on Fig. 10, select the earthquakes below that occur close to the Pacific/North American plate boundary. 2010-02-27 1938-02-01 1960-05-22 2005-03-28 1950-08-15 1922-11-11 2004-12-26 1963-10-13 1952-11-04 1965-02-04 1906-01-31 2007-09-12 2011-03-11 2012-04-11 1964-03-28 1957-03-09
After plotting the location of earthquakes on Fig. 10, select the earthquakes below that occur close to the Indo-Australian/Eurasian plate boundary. 2007-09-12 2010-02-27 2011-03-11 1923-02-03 000 1950-08-15 1965-02-04 1922-11-11 2005-03-28 1960-05-22 1964-03-28 1957-03-09 1906-01-31 1952-11-04 2012-04-11 2004-12-26 1938-02-01
After plotting the location of earthquakes on Fig. 10, select the earthquakes below that occur close to the Nazca/South America plate boundary. 2007-09-12 1965-02-04 1963-10-13 2012-04-11 2005-03-28 1957-03-09 2004-12-26 1964-03-28 1938-02-01 1922-11-11 1952-11-04 1960-05-22 1950-08-15 2011-03-11 1906-01-31 2010-02-27