Instruments available for use by fall 2021 and currently estimated to be available on a yearly basis in 2021-2024 have been listed here.

• Instruments available for use by fall 2021 and currently estimated to be available on a yearly basis in 2021-2024 have been listed here.
  • Güralp MINIMUS (and MINIMUS ⨹) DIGITIZERs (Guralp minimus)
  • GURALP 3ESPC SEISMOMETERs (Guralp 3ESPC)
  • CABLEs
  • GNSS
  • BATTERIES
  • Fortis ACCELEROMETERs (Fortis accelerometer)

Güralp MINIMUS (and MINIMUS ⨹) DIGITIZERs (Guralp minimus)

Photo: Güralp Systems Ltd.

• 24-bit, four-channel (⨹ eight-channel) digitizer with nominal 2.44 μV/count sensitivity
• Compact form: 134 × 99 × 45 mm (⨹ 134 × 139 × 45 mm) and 0.67 kg (⨹ 0.78 kg)
• Compatible with all analogue seismic sensors with a voltage output
• Simultaneously accommodates one (⨹ two) triaxial sensor(s), one (⨹ two) infra-sound sensor(s) and a digital feed from a Radian post-hole or borehole instrument
• Supports automatic Identification of I.P. addresses via Güralp Discovery software and a cloud-based or organisational registry server
• Remote instrument and data management via Discovery
• Bluetooth Android app for installation integrity checking
• Hot-swappable data storage with dual redundant microSD cards (2x 128GB MicroSD)
• GNSS time-synchronisation, compatible with Navstar (GPS), GLONASS, Galileo and BeiDou constellations. PTP is available for when GNSS is impractical

GURALP 3ESPC SEISMOMETERs (Guralp 3ESPC)

Photo: Güralp Systems Ltd.

The Güralp 3ESP Compact is a full-featured, three-axis, analogue, force-feedback seismometer. 

• 60 s - 100 Hz standard frequency response, (option of 120 s low-pass corner)
• Covers the complete seismic spectrum with a single transfer function
• Self noise below the USGS NLNM from 30 s to 16 Hz
• High linearity: > 107 dB horizontal, 111 dB vertical
• Over 140 dB dynamic range over a wide frequency band
• Cross axis rejection over 62 dB; sensor axes orthogonal to within ± 0.05°
• Robust automatic mass locking, unlocking and centring
• Low power consumption of just 750 mW
• Truly portable - just 8.4 kg with lifing handle, and convenient access to connectors
• Hard anodised aluminium enclosure
• IP68 - protection against effects of prolonged immersion at 3 m depth for 72 hours

CABLEs

5 meter long rigid instrument cable to connect the Minimus to 3ESPC. Min loop radius ~40cm (if bent too much, the cable will get damaged); 26 pin female military socket (bayonet).

GNSS

GNSS antenna with 10 meter cable.

BATTERIES

Sonnenschein GEL GF12063 Y04, 12V 70Ah/20h, measuring 261 x 171 x 210mm, weight 22,2kg.

Fortis ACCELEROMETERs (Fortis accelerometer)

Triaxial orthogonal Fortis DC to 100 Hz accelerometer.

Photo: Güralp Systems Ltd.