The Volcano Observation Network

For the purpose of mitigating volcanic disasters, we are developping The Volcano Observation Network, and monitoring volcanoes in Kanto area and the Izu-Bonin Islands.

The locations of observation stationsThe locations of observation stations

Volcanoes Number of Stations Sensors
Mt. Nasu 6 Seismometers
Mt. Fuji 6 Borehole seismometers, Borehole tiltmeters, GPS, Barometers, Precipitation meters, Thermometers
Isu-Oshima Island 4 Borehole seismometers, Borehole tiltmeters, Borehole 3-components strainmeter, Flux-gate type magnetometers, Scintrex-type gravimeters, Barometers, Precipitation meters, Thermometers
Miyakejima Island 4 Borehole seismometers, Borehole tiltmeters, GPS, Borehole 3-components strainmeters, Barometers, Precipitation meters, Thermometers
Iwojima Island 3 Seismometers, GPS

The detailed information of the observation network and a part of the obtained data are open to the public by VIsualization system for Volcanic Activity 2000(VIVA2000)Blank.

(Click figure to enlarge)

Airborne Multispectral scanner for volcano monitoring

VAM-90A (since 1991)

The VAM-90A instrument, a scanning spectrometer with nine spectral bands, was developed by NIED in 1990. These bands consist of three visible and near-infrared bands, two short-wave infrared bands, and four thermal infrared bands. VAM-90A allows temperature measurements ranging from ambient temperature to 1500 degree Celsius(Table 1). Flown aboard a Cessna 404 aircraft, VAM-90A is designed to scan through the nadir in a plane perpendicular to the velocity vector of the aircraft, with the maximum scan angle extending 30 degree on either side of nadir (Fig.1).

Figure 1: Schematic diagram of VAM-90A data acquisition.
Figure 1: Schematic diagram of VAM-90A data acquisition.

Figure 2: The VAM-90A instrument.

Control unitControl unit

Sensor unitSensor unit

Table 1: VAM-90A System Parameters.

Table 1: VAM-90A System Parameters.

The second instrument :New-VAM-90A (coming soon)

In spring of 2006, we have just developed a new remote sensing instrument for volcano observation. We will start on a next stage observation mission (Autumn of 2006).

Here is the partial list of our new mission's scope.

  • Surface temperature measurement (-20-1000 degree)
  • Volcanic gas detection (especially SO2)
  • Automatic geometric correction of the acquired image data(within 2hr)
  • Making useful information for volcanic disaster mitigation (ex. ash-fall area detection, estimation of heat flux of volcano.)
  • Scientific data collection(ex. surface emissivity in LWIR, reflectance in VNIR/SWIR)

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