Smaller Earthquakes Quote by Marcia Bjornerud
““With each integer on the Richter scale, there is a tenfold increase in the number of earthquakes that occur annually. On average, there is one magnitude 8 event, ten magnitude 7 events, a hundred magnitude 6 events, and so on, each year. If we consider this from an energy standpoint, the smaller earthquakes account for a significant fraction of the total seismic energy released each year. The one million magnitude 2 events (which are too small to be felt except instrumentally) collectively release as much energy as does one magnitude 6 earthquake. Although the larger events are certainly more devastating from a human perspective, they are geologically no more important than the myriad less newsworthy small ones.””
About This Quote
Source Lecture: Seismic Energy Distribution, 2010
Small, frequent earthquakes collectively release as much energy as a single large quake, highlighting their geological significance despite lower human impact.
In simple terms: Many tiny quakes add up to the same energy as one big quake.
Key Takeaway
Consider the cumulative impact of small events.
Themes
geology
energy
scale
risk assessment
Mood
analytical
informative
Type
scientific
educational
When to use this quote
- earthquake monitoring
- urban planning
- public education
- infrastructure design
Key Concepts
seismology
statistics
environmental science
Questions to Reflect On
- What does this tell us about risk perception?
- How should resources be allocated between large and small events?
A Different Perspective
Focusing only on large quakes can overlook the importance of monitoring and preparing for numerous smaller ones.
