Monthly Archives: July 2019

IWGoRS 5th, Sun Moon Lake, Taiwan – we will be here!

IWGoRS 5th International Working Group on Rotational Seismology Sun Moon Lake, Taiwan 2019/09/22 – 26

The 5th IWGoRS workshop will be held at the Teacher’s Hostel, Sun Moon Lake, Taiwan, from September 22-26, 2019. Institute of Earth Sciences, Academia Sinica (IES) will be the local host. The workshop will cover on all aspects of rotational seismology including (but not limited to):

instrumentation (portable sensors, ring lasers, tilt correction, etc)
observation of rotations (application domains, best practices)
array seismology (gradients, strains, rotations)
data processing, wavefield interpolation, phase separation
earthquake physics
volcano seismology
ocean-bottom observations
earthquake engineering
seismic inverse problems

With the advance of portable rotation sensor, we expect more rotation observations will be shown in the workshop.

New FOSREM FOS-5 sensor

The FOS-5 sensor contains a complete fibre-optic Sagnac interferometer with 250 mm diameter fiber-optics loop, analog to digital conversion circuits, FPGA based digital processing unit for close-loop operation, power conversion and management parts. All of these are placed in a robust case, meeting the IP67 requirements.
This internal digital processing unit provides rotation speed (Omega) value directly in digital form. The FOS-5 has an RS-485 interface for data and USB interface for diagnostic. The connection provides data transmission and power supply from PCU over only one, standard M12 cable within the distance of 500 meters.