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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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Action on our Seismometer Today: Earthquake Swarm or Volcanic Harmonic Tremor? (hint: no...)

 Frankly, if we lived next to a major fault zone or an active volcano, the seismic record above on our department seismometer would be worrisome beyond measure. Earthquake after earthquake usually means very bad things, the harmonic tremor leading to a major volcanic eruption or the buildup to a huge earthquake. Fortunately, I live in the Great Valley of California and such outcomes are

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