Erfan Horeh is a Ph.D. student in Oceanography at the University of Washington, specializing in underwater acoustics and Distributed Acoustic Sensing (DAS). His research focuses on using fiber-optic sensing to investigate ocean noise and marine environments. He holds both a bachelor’s and a master’s degree in Mechanical Engineering from Sharif University of Technology in Iran.

Asif Ashraf (he/him) is the Summer 2025 Cloud On-Ramp intern at EarthScope, working with Tammy Bravo and Sarah Wilson. He is currently pursuing a PhD in geophysics at the University of Oregon, where his primary research focuses on high-resolution seismic tomography imaging of the Cascadia subduction zone.

It’s been 22 years since the NSF first funded an ambitious project to build a large-scale geodetic network we now know as the Network of the Americas. As the NSF GAGE facility award reaches its end, it’s worth looking back at how we got here.

Alex Mehta is one of EarthScope’s 2025 Science Communication Interns, working with Scott Johnson and Emily Zawacki on a variety of visual media, including videos and infographics. She is currently a senior at the University of Georgia, where she is majoring in Marine Science. She is very passionate about science communication, particularly in the area of climate change.

Beck Hufstetler is one of EarthScope’s 2025 Science Communication Interns, working with Scott Johnson and Emily Zawacki. She’s working on creating videos and articles about how scientists locate materials deep underground, and why these materials are so important.

A new publication provides a comprehensive retrospective chronicling UNAVCO’s four-decade history supporting geodesy and the geosciences.

Yurong “Riley” Zhang (she/her) is EarthScope’s Summer 2025 Instrumentation Intern, working with Chris Calvelage. She is currently a PhD candidate at Michigan State University, working the seismic structure of Tonga and Pampean subduction zones and mantle wedges, with a particular emphasis on seismic attenuation, velocity tomography, and stress drop analysis. Previously, she earned her bachelor’s in geophysics from the University of Science and Technology of China.

As a reminder to real-time GNSS data users, the legacy real-time streaming service will be retired in less than a month on July 29, 2025. All users must transition to EarthScope’s modernized real-time GNSS data streaming platform before that date.

Seismic noise can serve as an indicator of wave action and sea ice coverage offshore.