document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=394229>Question 394229</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An earthquake registered 6.9 on the Richter scale.  It produced 3.5 x 10^13 J of energy.  How much energy did the Alaska earthquake, 8.2 on the Richter scale produce? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #279722 by </B><A HREF=/tutors/aboutme.mpl?userid=CharlesG2><B>CharlesG2(834)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CharlesG2><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=279722\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An earthquake registered 6.9 on the Richter scale.  It produced 3.5 x 10^13 J of energy.  How much energy did the Alaska earthquake, 8.2 on the Richter scale produce?\r<BR>\n" );
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document.write( "8.2 - 6.9 = 1.3 increase in magnitude<BR>\n" );
document.write( "ground movement increase = 10^(increase in magnitude)<BR>\n" );
document.write( "ground movement increase = 10^1.3 = 19.952623 to 6 places<BR>\n" );
document.write( "increase in energy = (ground movement increase)^1.5<BR>\n" );
document.write( "increase in energy = 19.952623^1.5<BR>\n" );
document.write( "increase in energy = 89.125094 to 6 places<BR>\n" );
document.write( "89.125094 * 3.5 x 10^13 J = 311.937829 x 10^13 J<BR>\n" );
document.write( "311.937829 x 10^13 J = approximately 3.1 x 10^15 J of energy<BR>\n" );
document.write( "(using formulas off http://www.backbenchmedia.com/richter-scale-equation-earthquakes/)<BR>\n" );
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