Join us at the EGU 2018! Booth 44
We have lined up a great program this year for EGU with poster presentations and new product introductions. Please visit us at our booth #44
The best digitizer just got better!
The new Centaur Digital Recorder (CTR4 series models) introduce a number of capabilities including calibration output enhancements that support broader sensor calibration capability. These new models support a current source mode in addition to voltage source mode and improved calibration output signal accuracy of ±1%. The voltage mode maximum output range has been doubled to 20 Vpp.
The new CTR4 series models include the CTR4-3A which has built-in case tamper detection, supports external tamper switches, and has built-in hardware authentication of CD-1.1 message formats, providing a fully-integrated, compact and low-power digitizing solution ideally suited for monitoring stations streaming authenticated data for test ban verification regimes.
For all models of Centaur, firmware version 4.3.13 adds a new highly versatile sensor orientation correction feature unique to Nanometrics which performs full 3D real-time data rotation to correct for sensor Azimuth misalignment, sensor tilt, as well as axis remapping.
Introducing the Trillium Horizon
The latest addition to the Trillium 120 product line is one of our most versatile seismometers to date. This seismometer matches the portability and deployability of our Trillium Compact line with the performance of our vault seismometers. This dual-purpose instrument can be direct buried at shallow depth or set on a pier, meaning the Trillium Horizon gives you the most versatility for your investment.
Poster Paper Abstracts
A New and Compact Portable Observatory Grade Broadband Seismometer For Direct Bury And Vault Use
T. Parker et al
Tuesday, 10 Apr, 17:30–19:00
Abstract ID: 296671 Paper Number: S11C-0613 Presentation Type: Poster
Session SM5.01/NH4.16 Ground translation, strain and rotation: New and improved instrumentation and applications (co-organized)
Location: Hall X2
There is 5 years of data from broadband seismic sensors designed for both direct burial and cased hole applications. These first posthole instruments have been deployed in a wide range of extremely challenging environments such as dynamic ice and snow environments, extreme wet and dry conditions in soils of high clay content, and steep creeping terrain. In all use cases the direct burial approach has consistently provided high quality data when compared to shallow vault installations. These field experiments demonstrate that while higher tilt tolerance is required for operational outcome certainty in some installations, the majority of installations can be addressed by a smaller instrument with a narrower tilt range of reduced size and cost. The lessons learned from this real world field data have guided the development of a new smaller, less expensive instrument, the Trillium Horizon. Based on this field data and and user feedback from many direct burial deployments, the Trillium Horizon seismometer has been developed as a simple versatile instrument to span the majority of deployment scenarios and specific use cases including shallow direct bury deployments, traditional piers, and problematic wet vault installs. With its small size, robust waterproof case and connector, +/-1.5° tilt range, dual-purpose cable, and accessories for both posthole and vault installation, Trillium Horizon is optimized for usability as well as performance.
Assessment of Earthquake Early Warning Approaches: Inputs, Products and Challenges
E. Yenier et al.
Friday, 13 April, 17:30–19:00
Session SM8.01 - Real time seismology and earthquake early warning
Location: Hall X3
Earthquake early warning (EEW) systems establish an important part of seismic loss mitigation programs. They are used to reduce the social and economic impacts of major earthquakes by providing an advance notification before the arrival of damaging seismic waves to a target site. With recent technological and scientific advances, today’s early warning systems can go much beyond this basic function, providing estimates of shaking intensity and potential damage for implementation of post-disaster emergency response plans. An effective EEW system requires not only a robust seismic network infrastructure and fast communication system but also a rapid event/ground-motion characterization algorithm well-calibrated to capture the seismological attributes of the region of interest. EEW systems should be able to automatically distinguish seismic radiations from noise and estimate shaking intensity of approaching S-waves at a target site based on early P arrivals for maximized notification time. Accuracy of automatic event detections and predicted intensities are as important as the advance warning time for achieving trustworthy EEW systems. These constraints add further challenges over those in conventional seismic monitoring practices. Most existing EEW systems operate based on two different approaches: on-site and regional. Here, we discuss each approach in terms of their inputs and products, with a focus on the challenges in realizing an effective warning system.