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| Home | People | Contact | About us | Vacancies | News Archive | MAGNET | Acknowledgements | Recent Research Great Basin Strain Basin and Range Dynamics Aquifer Deformation Geothermal Energy Global Tectonics Reference Frames Global Strain Rate Map Yucca Mountain GPS Publications MAGNET GPS Network Network Information and Data People Geoff Blewitt Bill Hammond Corné Kreemer Bret Pecoraro Justine Overacker Zack Young Aren Crandall-Bear Nina Miller Past Members Meredith Kraner Hans-Peter Plag Elliot Klein Jayne Bormann Jay Goldfarb Yang Zhang Sumant Jha Emma Hill Link to our Data Products Page: The Plug and Play Portal with Lists of all data products Quick Links to Data Products: Map Browse GPS Stations GPS Data Processing Strategy MAGNET GPS network Direct link to MAGNET RINEX data Publications Guide to QA Files New! Citation of Data Products Henceforth please use the following for citation of our data products: Blewitt, G., W. C. Hammond, and C. Kreemer (2018), Harnessing the GPS data explosion for interdisciplinary science, Eos, 99, https://doi.org/10.1029/2018EO104623. New! Troposphere Products Link to directory with all troposphere files. README file explaining troposphere files. Link to IGS SINEX format description. Browse Lists of Stations All Stations Processed Stations with rapid 5 minute sample rate solutions (latency 24 hours) Stations with ultra rapid 5 minute sample rate solutions (latency 1.5 hours) Above lists have links to station pages. MIDAS Velocity Fields In IGS14 Reference Frame Plate Reference Frames: AF - Africa AN - Antarctica AR - Arabia AU - Australia BU - Burma CA - Caribbean CO - Cocos EU - Eurasian IN - Indian MA - Mariana NA - North America NB - North Bismark NZ - Nazca OK - Okhotsk ON - Okinawa PA - Pacific PM - Panama PS - Philippine Sea SA - South America SB - South Bismark SC - Scotia SL - Shetland SO - Somalia SU - Sunda WL - Woodlark The plates frames are defined using Euler rotation poles found in the supplement of Kreemer et al., 2014. Legacy Reference Frames: In NA12 Reference Frame In IGS08 Reference Frame More Information: MIDAS velocity file format README Download the MIDAS code and examples MIDAS software release notes Downloadable Lists of GPS Data Holdings: Download list of GPS station latitude, longitude, and heights Download list of GPS stations sorted (in reverse order) by date added to NGL system (yyyy_ddd) Stations with 24 hour sample rate solutions, final orbits, 2 week latency. Stations with 24 sample rate solutions, rapid orbits, 24 hour latency. Stations with 5 minute sample rate solutions, rapid orbits, 24 hour latency. Stations with 5 minute sample rate solutions, ultra rapid orbints, 1.5 hour latency. The linked text files above are updated daily and include: Station Name, Latitude, Longitude, Height, XYZ coordinates, data begin and end dates, number of solutions and station operator original site name. Database of Potential Step Discontinuities Link to master steps database. README for steps database. Decimal Year Convention: Explanation and translation file System Status Notes One of our disk raids is currently down so 5 minute final solutions are for the time being unavailable. Troposphere files were also affected but can be temporarily accessed at http://geodesy.unr.edu/gps_timeseries/trop_temp Latest News [October 9, 2020] Western Transverse Ranges Research Spotlight in Eos In collaboration with a multi-institution team NGL has published a new study on the long- and short-term uplift of the western Transverse Ranges, and how these motions relate to fault activity, slip rates and earthquake potential. The study integrates geodetic data with fault and other geologic data to model subsidence along the Santa Barbara coastline and uplift of the Santa Ynez Range. The uplift and subsidence are consequences of recoverable elastic deformation associated with interseismic locking on faults dipping under the Western Transverse Ranges. Long term uplift of the Santa Barbara coast is achieved through the intermittant earthquakes that reverse the short term subsidence. Eos is now featuring a research spotlight on the work. To go directly to the article click on the image below, or see the post on Twitter . The Johnson et al., 2020 article is now published in the Journal of Geophysical Research - Solid Earth . [July 23, 2020] M 7.8 Alaska Penninsula On July 22, 2020 a thrust earthquake occurred offshore at 28 km depth within the Aleutian trench where the Pacific Plate subducts beneath the North American plate. The event caused coseismic movement of a number of stations on the Alaska Peninsula and Aleutian Islands. We estimated coseismic offsets the day after the earthquake from 5 minute sample rate time series that were derived using rapid orbits from the Jet Propulsion Laboratory. Most of the stations are from the UNAVCO operated Network of the Americas . Near the end of the peninsula the horizontal offsets indicate south-southwest motion, consistent with trenchward motion of the hanging wall. Significant vertical motions were also observed, for example station AC12 moved upward over 34 cm and station AC28 moved downward 7.5 cm. Preliminary coseismic offsets table based on next-day 5 minute solutions is : here . [June 28, 2020] M 5.8 Earthquake Near Lone Pine, Eastern California shakes the Southern Sierra! A moderately sized earthquake struck the southern Owens Valley on June 24, 2020, causing widespread shaking and rock fall in the southern Sierra Nevada. The event was detectable in small movements of several nearby continuous GPS stations including P093 and P465 from NSF's Network of the Americas operated by UNAVCO . P093 moved south by about 6 mm and P465 moved west about 4 mm. The direction of movements are characteristic of coseismic contraction and extension that are consistent with the P and T axes the seismic moment tensor . Precision of these measurements will improve as more post-event data are collected. Additionally, more vectors will become available once data are retrieved from stations in UNR's MAGNET GPS network (locations shown with blue triangles in figure below). Preliminary coseismic offsets table: here . [June 26, 2020] M 7.4 Earthquake Oaxaca, Mexico A large earthquake struck southern Mexico on June 23, 2020. Preliminary cosismic displacements are available which show large offsets for stations nearest the epicenter. The station OXUM moved over 16 cm southwest and rose vertically over 4 cm. Preliminary coseismic offsets table: here . [June 19, 2020] Update on Monte Cristo M6.5 Earthquake Update on coseismic offsets table: here . [June 2, 2020] Update on Monte Cristo Earthquake Over the past week data collection on the Monte Cristo Range earthquake has continued. We now have coseismic offsets on 24 MAGNET stations, 15 of which are recording signficant coseismic displacement. Stations in each of the four quadrants of the displacement field have returned data, revealing the systematic horizontal NW-SE extension, NE-SW contraction, characteristic of a strike slip earthquake. An updated offset map and table are provided below. The largest offset so far is at station COLU , on the west side of the Columbia Salt Marsh, which has 145 mm displacement to the northeast. These offsets and some preliminary modeling are now sufficient to favor slip on a left lateral plane striking 78 degrees clockwise from north, similar to what are indicated by InSAR, aftershock, and surface rupture data. A table of preliminary coseismic offsets is available for download here . [May 24, 2020] Update on Monte Cristo M6.5 Earthquake Since the earthquake occurred on May 15, we have gotten some of the first data back from MAGNET stations to our laboratory and processsed. These data are beginning to provide constraint on the near- to medium-field coseismic displacement pattern. Among these were one of the closest stations to the epicenter MONT (17 km from epicenter), that moved 66 mm to the southwest in the event. We...