The moment magnitude is a type of scale used to measure...

the intensity of solar storms

Earth's axial tilt

the brightness of stars

the size of earthquakes

The moment magnitude scale (MMS; denoted as Mw or M) is one of many seismic magnitude scales used to measure the size of earthquakes

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Answers by country

the Netherlands

21%

14%

57%

the United Kingdom

21%

15%

13%

50%

Poland

17%

20%

18%

41%

1902

Pakistan

27%

36%

the Philippines

45%

36%

Australia

21%

14%

28%

35%

Germany

39%

16%

34%

the United States

19%

22%

27%

30%

Nigeria

45%

18%

27%

India

28%

24%

21%

23%

110

Greece

30%

23%

Ghana

40%

10%

30%

20%

Historically, the nautical mile was defined as ...

one minute of latitude

one hour cruise on average wind

1/12 distance from Calais to London

1000 English yards

When did the USA introduce the metric system as preferred for weights and measures?

The knot is a unit of speed equal to...

one nautical mile per hour

5 miles per hour

3.6 kilometres per hour

1852 metres per second

What is called this common iron mineral occurring as cuboid crystals?