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INFORMATION ABOUT HOTVOLC X

I - HOTVOLC: Interface shortcuts

General shortcuts:

 +    Increment time by 15 minutes.

 +    Decrement time by 15 minutes.

 +    Increment time by 1 hour.

 +    Decrement time by 1 hour.

Timeseries shortcuts:

 +    Move to the date and time of the selected data point on the time serie.

Archive mode timeline shortcuts:

   Move to the date and time hovered in the timeline.

   Zoom in and out on the timeline

 +    Drag to navigate back and forth in the timeline.

II - HOTVOLC: Observing system

HOTVOLC is a web-based satellite-data- driven reporting system dedicated to the real-time observation of volcanic products. This application is developed and managed by the Observatoire de Physique du Globe de Clermont-Ferrand (OPGC). It uses on-site automated ingestion of MSG-SEVIRI geostationary satellite data from EUMETSAT primary dissemination protocol using the Digital Video Broadcasting - Satellite 2 (DVB-S2) service.

This allows acquisition of High Rate Information Transmission (HRIT) level 1.5 data format, corresponding to image data that have been corrected for unwanted radiometric and geometric effects. Images are geolocated, calibrated and radiance linearized.

HRIT digital numbers are converted into spectral radiance (in Wm-2sr- 1µm-1) and then processed through validated algorithm for direct dissemination of ready-to-use products on a full web-GIS interface.

This application allows you to interactively browse satellite imagery and associated products for both real-time (RT) and past events.

III - HOTVOLC: Deliverables

We currently provide real-time Earth Observation (EO) products of volcanic activity at a 15-min time step on about 50 targets. Data provided can be:

Lava monitoring:

- Thermal state @3.9μm (geotiff map + CSV timeseries)
- Total spectral radiance (CSV timeseries)
- Number of hot spots (geotiff map + CSV timeseries)
- Discharge rate (m³/s) (CSV timeseries)

Ash monitoring:

- BTD 2-Bands method (geotiff map + CSV timeseries)
- BTD 3-Bands method (geotiff map + CSV timeseries)
- BTD 5-Bands method (geotiff map + CSV timeseries)
- Ash plume area based on BTD 2-Bands (CSV timeseries)
- Ash plume maximum altitude based on BTD 2-Bands (geotiff map + CSV timeseries)
- Ash plume concentration based on BTD 2-Bands (geotiff map + CSV timeseries)
- Ash plume total mass based on BTD 2-Bands (CSV timeseries)
- Ash plume contour

SO₂ monitoring:

- SRD tropospheric @8.7μm (geotiff map + CSV timeseries)
- SO₂ plume area (CSV timeseries)

IV - HOTVOLC: Staff

Scientist in charge:

- Mathieu GOUHIER (Physicien-Adjoint, OPGC-LMV) - m.gouhier@ogpc.fr

Contributors:

- Philippe LABAZUY (Physicien-Adjoint, OPGC-LMV)
- Yannick GUÉHENNEUX (IE, OPGC)

Technical staff:

- Philippe CACAULT (IR, Resp. SDI, OPGC)
- Yannick GUÉHENNEUX (IE, OPGC)
- Gaël RAUX (engineering student, ISIMA)
- Rémi HUERTA (engineering student, ISIMA)
- Sandrine RIVET (IE, OPGC)
- Judicaël DECRIEM (IR-CDD, OPGC)
- Jean-Claude BERGÈS (IR - Paris 1)

V - HOTVOLC: Support

- Observatoire de Physique du Globe de Clermont-Ferrand (https://opgc.uca.fr)
- CNRS-INSU Service National d'Observation en Volcanologie (https://www.insu.cnrs.fr)
- Centre National d'Études Spatiales (https://cnes.fr)
- EUMETSAT (https://www.eumetsat.int)
- Météo France (https://meteofrance.fr)

BY CONTINUING, THE USER AGREES TO THE FOLLOWING TERMS OF USE

Data provided by HOTVOLC can only be published with our permission. Publications must include an acknowledgement of, and a citation to, the HOTVOLC Observing System as specified below :

Contact: M.Gouhier@opgc.fr

Acknowledgement

The authors gratefully acknowledge the HOTVOLC Observing System, hosted by OPGC, for the provision of satellite imagery and/or READY products via https://hotvolc.opgc.fr

Citation

Gouhier M., Guéhenneux Y., Labazuy P., Cacault P., Decriem J., Rivet S. (2016). HOTVOLC : a web- based monitoring system for volcanic hot spots. Geological Society, London, Special Publications, 426, SP426-31, doi: 10.1144/SP426.31

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• Spectral radiance at 3.9 μm
• Spectral radiance at 12 μm

• TSR (Total Spectral Radiance)
• Hotspots number
• VFR (Volume Flow Rate)

• BTD (2-Band method)
• Area (km²)
• Altitude max (km)
• Concentration max (g/m²)
• Total mass (kt)

• SRD (tropospheric at 8.7 μm)
• Area (km²)

X GENERATE CSV FILES