Logarithmic scale: Richter scale (earthquake)

Lessons

1. The 2011 earthquake in Japan measured 9.0 on the Richter scale.
   The 2008 earthquake in China measured 7.9 on the Richter scale.
   Complete the following 2 sentences:
   (i) The Japan earthquake was __________ times as intense as the China
   
   earthquake.
   
   
   (ii) The China earthquake was __________ times as intense as the Japan
   
   earthquake.
   
2. Earthquake "Alpha" measured 5.8 on the Richter scale.
   Earthquake "Beta" was 200 times as intense as Earthquake "Alpha".
   Earthquake "Gamma" was ${ 1\over 1000 }$ times as intense as Earthquake "Alpha".
   What was the Richter scale readings for:
   (i) Earthquake "Beta"
   (ii) Earthquake "Gamma".