ETH Zurich, Switzerland – John Clinton
“The Seismic Network at SED has been using PQLX since 2008, and migrated to SQLX a few years ago. SQLX has become a core element of our routine network monitoring and is the first QC tool we use to try to understand problems with a station. The SED monitors over 200 stations in realtime, with SQLX updating all stations daily. The SQLX database and interactive GUI allows us to spot problems with stations; quickly detect and diagnose a huge variety of station issues; and understand patterns and trends in background station noise. SQLX is also heavily used to understand site noise profiles when we investigate alternatives for new stations. Over the last decade we have consistently been impressed with the stability and regular feature enhancements of the core software and the customer support provided by Boaz Consultancy.”
OSOP, S.A., Panama – Branden Christensen
“Every seismograph and Raspberry Shake manufactured by OSOP is analyzed with SQLX for timing accuracy and adherence to nominal instrument response values. SQLX allows us to streamline data QC and minimizes the time needed to crunch the results and identify problems. It is difficult to imagine instrument R&D and QC without SQLX.”
INGV, Italy – Alberto Michelini, Valentino Lauciani
“SQLX is a tool that has been found of great importance to assess the quality of the data acquired by the “Rete Sismica Nazionale” (Michelini, et al., 2016). The software provides an immediate glance at possible malfunctioning or erroneous settings of the seismic channels. In addition, we have found a very friendly interaction with the developer that helped to identify possible problems and to optimize the installation.”
NASA Marshall Space Flight Center – NASA, U.S.A. – Jesse-Lee Dimech
“One seismic station in our NZ network wasn’t able to clearly see earthquakes that were visible on other stations, so we removed that station less than a year later not knowing exactly what was wrong with it. We kept the data because it still showed something, it just didn’t look right. Later, I ran a month of this station’s data through PQLX, and found that there was something seriously wrong with the high frequencies of the instrument, but the low frequencies looked fine and had a reasonable noise floor. The issues only started below ~1Hz, so I could still use it to calculate ~1.5Hz teleseismic receiver functions. To my surprise, the receiver function result was as good as at any other station. If it wasn’t for PQLX, I may have discarded this station entirely. This station ended up being an important component of a receiver function CCP stack.”