# Logarithmic scale: Richter scale (earthquake)

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### Examples

#### Lessons

- 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.

- 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".