Seismology

The Company was founded in 1965 and since then it is the main Supplier & Partner after the sale ,  to all users & dynamic customers of the specific market,

With the accumulated gained experience & activity of these on going six (6)  decades, our Company guarantee both the technical superiority of our products and the most competitive prices ,

In Seismology during our long  presence   we have implemented  the 1st National Earthquake e Monitoring system  in Greece  ,  the Earthquake  Planning & Protection Organization   with our Principal back then & giant of the International Seismology & Instrumentation Teledyne Geotech ,

From 1999 we have started a cooperation & we are now already working exclusively with Global Market Leader Guralp UK and we are the major Suppliers of Seismological Equipment &  Services to all Labs of Seismology  & Geophysics of Universities , of the Institutes  , the National Observatory  of Athens ,  ITSAK/OASP  , certain   leading Construction Companies ,

We have been proved very successful in highly demanding & complex Structural Monitoring Projects and our portfolio includes the Greek Railways , TERNA and leading Private & Public Organizations  

In the Geophysical & the Geotechnical Instruments we also have a presence of 55 consequent years and we work with the leading companies in the industry I.E. Geometrics , AGI , ACE instruments etc.  

 

World leading seismometers and accelerometers

We have been providing our revolutionary broadband seismic instrumentation to the research community for more than 30 years. Our instruments have underpinned countless research projects over the years, and this in turn has directed the development of our product range. We have equipment suited to both permanent and temporary arrays that can be used for earthquake, aftershock and volcano monitoring. Our instrumentation is also used to monitor triggered and induced seismicity resulting from human actions across a range of industries.

Güralp has been designing and manufacturing revolutionary broadband seismometers and accelerometers for more than 30 years. Our seismic sensors are used worldwide by academic, public, governmental and private organisations to understand and explore our world.

Güralp broadband instruments record seismic events and signals of all kinds, from teleseismic events occurring on the other side of the planet, to microseismic events such as those induced by unconventional hydrocarbon extraction (e.g. hydraulic fracturing).

Our range of OBS have been developed and enhanced over thirty years, with options for virtually every deployment scenario.

Tried and tested on successful deployments all around the globe, ours is the most comprehensive range of cabled and portable ocean bottom instruments available.

As well as housing truly broadband, triaxial sensors to capture the full seismic frequency range, a must for all seismic monitoring applications, we can also integrate additional sensors and gauges, vastly extending the application and capability of our OBS systems.

Aquarius

The revolutionary Aquarius is an evolution of our Liber ocean bottom seismometer, utilising acoustic telemetry capability to deliver near real-time seismic data from the ocean floor to the surface without cables.
Aquarius is a stand-alone free fall OBS with acoustic data telemetry for deployments at depths of up to 6000m.

The system is available in two variants depending on the application and required timescales between battery charge.

Aquarius – for seismic research, when data transfer is needed only at the installation
and at the recovery of the OBS
Aquarius+ – for seismic research and alert, when data transfer is required either on trigger, or on demand at any point during the deployment window

Both systems are equipped with a digital feedback tri-axial broadband seismometer, operational at any angle and with a configurable long-period corner. A three-axis magnetometer and a MEMS accelerometer record the seismometer’s 3D position on the seabed for data rotation during post-processing.

An autonomous OBS system with acoustic telemetry for research applications when data transfer is needed only at the installation and at the recovery of the OBS.
The Aquarius battery is sized to record seismic data for 15 months and is equipped with an omnidirectional transducer for data transfer to ensure successful deployment.

State of Health parameters and noise performance data from the seabed are streamed following installation to confirm commencement of seismic recording.

At the end of the operation window, the acoustic link activates the burn-wire for release to the surface and an on-board satellite tracking system guides recovery.

An additional sensor can be fitted within the Aquarius canister such as a hydrophone or a high precision pressure sensor; or alternatively an external Absolute Pressure Gauge can be connected. The system is equipped with rechargeable lithium-ion batteries for fast and easy re-deployments (less than 12 hours needed to re-charge a flat system).

Compact OBS equipped with an acoustic modem
Digital feedback tri-axial broadband seismometer, operational at any angle, with a flat response between 120s and 100Hz
A three-axis magnetometer and a MEMS accelerometer record the seismometer’s 3D position on the seabed
Transmission of State of Health parameters and noise performance data from the seabed following installation
Dual redundant 128 GB Micro-SD card
Gigabit Ethernet retrieval of data once recovered, with OBS powered using Power over Ethernet (PoE) to allow battery re-charge to commence simultaneously
Acoustic burn-wire release mechanism with satellite tracking system to guide recoveries, with location alerts sent via email, SMS and/or webpage

Designed for seismic research and alert applications, the Aquarius+ is equipped with a directional transducer for data transfer during deployment.
The Aquarius+ offers optional methods of data retrieval as follows:

The data logger automatically detects seismic events using a STA/LTA trigger. A compressed list of triggered events is rapidly sent to the surface by the acoustic link with minimum power requirement. The operator can then select which
detailed event data is required for energy efficient transmission.

Alternatively, the operator can stream portions of seismic data from a time window selected using the Güralp software available on the surface.
Bi-directional communication with the underwater system allows interaction with the datalogger when the OBS is installed on the seabed, making it possible to change recording parameters and to check fundamental settings during the experiment (i.e. State of Charge of the battery pack).
The acoustic link activates the burn-wire for release to the surface and an on-board satellite tracking system guides recovery.

Compact OBS equipped with an acoustic modem
Digital feedback tri-axial broadband seismometer, operational at any angle, with a flat response between 120s and 100Hz
A three-axis magnetometer and a MEMS accelerometer record the seismometer’s 3D position on the seabed
Transmission of State of Health parameters and noise performance data from the seabed following installation
Up to 9000 bps transmission of data between seabed and surface using acoustic communication
Aquarius+ automatically transmits compressed list of events detected using STA/LTA triggers, with option to request full data transmission for selected events
Dual redundant 128 GB Micro-SD card
Gigabit Ethernet retrieval of data once recovered, with OBS powered using Power over Ethernet (PoE) to allow battery re-charge to commence simultaneously
Acoustic burn-wire release mechanism with satellite tracking system to guide recoveries, with location alerts sent via email, SMS and/or webpage

Orcus

A real-time cabled OBS that sits fully or partially buried on the seafloor for depths of up to to 6000 m/19,685 ft
Depending on the deployment depth, housing is either duplex stainless steel or titanium to protect against corrosion. The unique spherical shape of the casing protects the instrument at high pressures, and an underlying metal plate ensures optimum ground coupling. An optional concrete dome hood can be employed to reduce noise and protect against trawling in shallower waters.

An integrated state of the art Güralp Affinity digitizer delivers data in real-time to the cable system. The frequency range of the sensor can be engineered to suit the requirements of the project. If more than one response range is required, additional sensors or hydrophones can be incorporated. Non seismic sensors, such as absolute pressure sensors for tsunami early warning can also be integrated.

Key features:

  • Suitable for depths of up to 6000 m (19,685 ft)
  • Cable-to-shore or cable-to-buoy system
  • Optional add-on sensors include absolute pressure sensor, hydrophone, current meter and thermometer
  • Aluminium or titanium housing for corrosion resistance and waterproofing
  • Optional concrete dome to reduce noise and protect against fishing trawlers
  • Data digitised at site with real-time streaming to onshore data centre
  • Digitizer timing synchronised with NTP or PTP protocols.
  • External sensors with Ethernet can use the same timing protocols
  • Flexibility to connect with a wide range of cable systems e.g. Ethernet or optic fibre
  • Constant power supply plus back-up battery
  • Deployment via winch with ROV support required for deeper installations
  • Robust self-levelling system

Maris

A real-time cabled OBS, pushed or cored into the seafloor, suitable for depths up to to 3000 m / 9,854 ft*
Housed in titanium or stainless steel, the Maris houses a broadband sensor that is fully operational at any angle to support versatile installations. Insertion into the seafloor minimises ambient noise to produce exceptional data quality and increase trawl resistance in shallower deployments. An internal magnetometer and MEMS accelerometer work together to automatically compensate for tilt and horizontal orientation to deliver high-quality waveforms.

The Maris system can be a single instrument or a string of up to eight instruments and includes the Minimus digitiser, housed in a seperate vessel, to deliver data over Ethernet direct to the cabling system. The Minimus also offers a low-latency mode running causal filters alongside traditional acausal filters for earthquake early warning applications. The frequency range of the broadband sensor can be engineered to suit the requirements of the project.

*Deeper options are available.


Key features:
Suitable for depths of up to 3000 m (9,854 ft)
Subsurface burial for improved data quality and trawl resistance
Easily strung together for daisy chain arrays
Titanium or stainless steel casings
The system Minimus digitises data at site with real-time streaming over Ethernet to the onshore data centre
Optional low-latency mode running causal filters
Power and Ethernet stream via wet-mateable connector
Synchronised absolute time with onshore GPS
Flexibility to connect with a wide range of cable systems e.g. optic fibre
Deployment and cable installation via ROV

Breve

A rapid response OBS that is lowered on a winch into shallow water of up to 150 m /492 ft depth
The system is lowered to the seafloor using a winched cable which allows for accuracy of deployment location, whilst avoiding the requirement for specialist deployment vessels. The instrumentation is housed in a protective, waterproof, aluminium casing to protect the instrument from corrosion. On project completion, the system is recovered via an acoustic activated release buoy.

The frequency range of the sensor can be engineered to suit the requirements of the project. A hydrophone is incorporated, alternatively this channel can be used for another analogue sensor like a differential pressure gauge or an absolute pressure gauge.

Key features:

  • Maximum depth of 150 m (492 ft)
  • Sensor is operational at any angle
  • Simple deployment process via winched cable
  • Non specialist deployment vessels can be used
  • Minimal Linear clock drift: < 1 ms per day
  • Low-power electronics maximises battery power for continuous running durations of up to six months
  • Is equipped with a hydrophone
  • Aluminium housing material to protect instrument from water and corrosion
  • Acoustic mechanical release system