Patterns in Open vent, Strombolian Behavior at Fuego Volcano, Guatemala, 2005-2007 Bulletin of Volcanology (in press) Authors: (MTU): JJ Lyons, GP Waite,

Patterns in Open vent, Strombolian Behavior at Fuego Volcano, Guatemala, 2005-2007

Bulletin of Volcanology (in press)

Authors:(MTU): JJ Lyons, GP Waite, WI Rose,

(INSIVUMEH): G Chigna

INSIVUMEH

• Develop simple tools to improve daily monitoring

• Characterize activity at Fuego

• Improve understanding of how Fuego works, sharing gains with INSIVUMEH scientists and observers

Fuego volcano, Guatemala 2005-2007: objectives

Fuego volcano, Guatemala 2005-2007: overview

Fuego volcano, Guatemala 2005-2007: overview

Observational volcano monitoring

Eruptive pattern recognition

Fuego volcano, Guatemala 2005-2007: cyclic eruptive behavior

Passive lava effusion

Paroxysmal eruptions

Degassing explosions

eruption1

eruption2

eruption3

Fuego volcano, Guatemala 2005-2007: lava flow length, thermal output, patterns in eruptive behavior

Fuego volcano, Guatemala 2007: seismo-acoustic data

Short period (1 Hz) single component seismometer

Persistent tremor

Harmonic, gliding

Typically 1-3 Hz

Fuego volcano, Guatemala 2007: seismo-acoustic data

2 low frequency microphones

degassing explosion

strombolian explosion

Fuego volcano, Guatemala 2007: data comparison

Tremor energy, lava flow length, thermal output

Fuego volcano, Guatemala 2007: cumulative trends

Lava flow and thermal output agree for three periods of activity

Tremor continues during degassing explosions

Fuego volcano, Guatemala 2005-2007: estimate of lava volume extruded and output rate

Output rate: 0.18 m3s-1 (0.021 – 2.43 m3s-1)

Erupted lava volume: 11.3X106 m3 (9-48X106 m3)

Fuego volcano, Guatemala 2005-2007: model for production of eruption cycle

Foam growth model (Jaupart and Vergniolle 1989)

Passive lava effusion andstrombolian explosions stable foam growth and flow into conduit

Paroxysmal eruptions unstable foam growth and collapse

Degassing explosions drainback and slow foam growth

Fuego volcano, Guatemala: current and future work

Detailed characterization of tremor at Fuego

and array analyses

Acoustic determination of

explosive gas volumes

Measuring gas species ratios via

FTIR