volcanic tremor

Continuous seismic signal with regular or irregular sine wave appearance and low frequencies (0.5-5 Hz). Harmonic tremor has a very uniform appearance, whereas spasmodic tremor is pulsating and consists of higher frequencies with a more irregular appearance.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • tremor — ALASKA VOLCANO OBSERVATORY GLOSSARY Low amplitude, continuous earthquake activity often associated with magma movement. GLOSSARY OF VOLCANIC TERMS A continuous vibration of the ground around active volcanoes (Vergniolle and Mangan, 2000, p. 447) …   Glossary of volcanic terms

  • Tremor (vulcanología) — Sismógrafo registrando un tremor. Un tremor es un tipo de terremoto característico de los volcanes, causado por el movimiento del magma. Los golpes del magma con las paredes de la cámara magmática o en el conducto de salida, las explosiones de… …   Wikipedia Español

  • harmonic tremor — ALASKA VOLCANO OBSERVATORY GLOSSARY A continuous release of seismic energy typically associated with the underground movement of magma. It contrasts distinctly with the sudden release and rapid decrease of seismic energy associated with the more… …   Glossary of volcanic terms

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  • Harmonic tremor — describes a continuous rhythmic earthquake in the Earth s upper lithosphere that can be detected by a seismograph and often precedes or accompanies volcanic eruptions.A harmonic tremor is a continuous release of seismic energy typically… …   Wikipedia

  • harmonic tremor — noun A rhythmic shaking of the ground detectable by a seismograph, and associated with volcanic activity. Often a symptomatic warning of an eruption …   Wiktionary

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  • Earthquake — For other uses, see Earthquake (disambiguation). Global earthquake epicenters, 1963–1998 …   Wikipedia

  • Timeline of natural disasters in the Azores — Here were the natural disasters that happened in the Azores Islands.1401 1500*Around 1432 first recorded famine in the Azores. *1439? 1444? Volcanic eruption on Sete Cidades, Miguel The eruption was not recorded especially the precise date for… …   Wikipedia

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