Earthquake stats:

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Magnitude vs time | Number of quakes per magnitude

1. Number of quakes per day:

Past 24 hours:
Number of quakes and energy during the past 24 hours
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Past 30 days:
Number of quakes and energy during the past 30 days
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Past 90 days:
Number of quakes and energy during the past 90 days
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2. Number of events and energy released by magnitude:

Past 24 hours:
Number of quakes and energy vs magnitude past 24 hrs
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Past 7 days:
Number of quakes and energy vs magnitude past 7 days
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Past 30 days:
Number of quakes and energy vs magnitude past 30 days
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The histograms show some interesting facts:
- Quake frequency decreases exponentially with magnitude, or vice versa: small earthquakes are MUCH more frequent than larger ones. The apparent decrease of very small earthquakes towards lower magnitude is because tiny quakes (below magnitudes 3 or so) are only being registered in a few places of the world, but in reality occur in their thousands every day.
- Even though smaller quakes are much more frequent, they release much less energy combined than a single large one.
The reason is that earthquake energy increases by a factor of 30 for each magnitude step: for example, a magnitude 6 earthquake contains as much energy as 30 magnitude 5 quakes!


3. Magnitude and energy released over time:

Past 24 hours:
Magnitude of quakes and energy vs time past 24 hrs
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Past 7 days:
Magnitude of quakes and energy vs time past 7 days
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Past 30 days:
Magnitude of quakes and energy vs time past 30 days
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