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Robert P. Dziak
Pacific Marine Environmental Laboratory
OceanographyVolcanoGeologySeismologyGeophysics
209Publications
31H-index
3,425Citations
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Publications 179
Newest
#1Adrienne Copeland (Office of Ocean Exploration and Research)
#2Robert P. Dziak (PMEL: Pacific Marine Environmental Laboratory)H-Index: 31
Last. DelWayne R. Bohnenstiehl (NCSU: North Carolina State University)H-Index: 27
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#1Matthew M. Haney (USGS: United States Geological Survey)H-Index: 19
#2Alexa R. Van Eaton (USGS: United States Geological Survey)H-Index: 10
Last. Michael StockH-Index: 8
view all 11 authors...
We combine global detections of volcanic lightning with acoustic and hydroacoustic data to investigate novel indications of plume electrification in ground-based, geophysical data streams during the 2016–2017 eruption of Bogoslof volcano, Alaska. Such signals offer additional ways to diagnose the occurrence of volcanic lightning and confirm whether eruptive activity is producing significant amounts of ash. We discuss three signatures of lightning activity: volcanic thunder, electromagnetic pulse...
3 CitationsSource
#1Gabrielle Tepp (USGS: United States Geological Survey)H-Index: 2
#2Robert P. Dziak (PMEL: Pacific Marine Environmental Laboratory)H-Index: 31
Last. Joseph H. Haxel (OSU: Oregon State University)H-Index: 13
view all 7 authors...
In mid-December 2016, Bogoslof volcano, Alaska, began an 8.5-month-long eruption that produced at least 70 explosions and three lava domes. Bogoslof is an emergent submarine volcano with only the very top forming a small island, so the eruptive activity mostly occurred from a vent submerged beneath a bay or lagoon. The Bogoslof eruption was recorded on regional seismic and infrasound arrays as well as by a hydrophone that was deployed locally during the second half of the eruption. Since few eme...
11 CitationsSource
#1Joseph H. Haxel (PMEL: Pacific Marine Environmental Laboratory)H-Index: 13
#2Haru Matsumoto (PMEL: Pacific Marine Environmental Laboratory)H-Index: 12
Last. Scott E. Stalin (PMEL: Pacific Marine Environmental Laboratory)H-Index: 4
view all 7 authors...
Ocean gliders are a quiet and efficient mobile autonomous platform for passive acoustic monitoring and oceanographic measurements in remote marine environments. During July 20—August 6 2012, we used a Teledyne Webb Research Slocum G2 glider equipped with a hydrophone logging system to record ocean sound along a 458 km north to south traverse of the outer continental shelf break along the U.S. Pacific Northwest coast. Glider derived recordings yielded a unique perspective on the variation of ambi...
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#1Angela L. Sremba (PMEL: Pacific Marine Environmental Laboratory)
#1Angela L. Sremba (OSU: Oregon State University)H-Index: 5
Last. John Calambokidis (WashU: Washington University in St. Louis)H-Index: 41
view all 10 authors...
Here we present results of a pilot project to simultaneously collect photographs, acoustic call records, and tissue biopsy sample of a blue whale from the eastern North Pacific, with the goal to assign the individual to a population of origin based on acoustic call records and genetic profile. On 17 October 2018, a pair of blue whales was located ∼27 miles off the Oregon coast. Using a small research vessel, we documented the encounter with photographs and collected a tissue biopsy from one of t...
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#1Holger KlinckH-Index: 7
#2Haru MatsumotoH-Index: 12
Last. David K. MellingerH-Index: 4
view all 3 authors...
Abstract : With ONR/DURIP funding (award # N00014-13-1-0345), we are currently developing the Long-term Acoustic Real-Time Sensor for Polar Areas (LARA) which combines the advantages of both submerged and surface acoustic observing systems. LARA makes stationary passive acoustic monitoring efforts more effective, and provides maximum flexibility allowing for a wide range of applications even in ice-covered polar areas. While the ONR/DURIP award provides funding to design and manufacture the prot...
#1Samara M. Haver (PMEL: Pacific Marine Environmental Laboratory)
#2Michelle E. H. Fournet (Cornell University)
Last. Sofie M. Van Parijs (NOAA: National Oceanic and Atmospheric Administration)H-Index: 16
view all 11 authors...
Passive acoustic sensors provide a cost-effective tool for monitoring marine environments. Documenting acoustic conditions among habitats can provide insights into temporal changes in ecosystem composition and anthropogenic impacts. Agencies tasked with safeguarding marine protected areas, such as the U.S. National Park Service and U.S. National Oceanic and Atmospheric Administration’s Office of National Marine Sanctuaries, are increasingly interested in using long-term monitoring of underwater ...
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#1Gabrielle Tepp (USGS: United States Geological Survey)H-Index: 2
#2William W. Chadwick (PMEL: Pacific Marine Environmental Laboratory)H-Index: 37
Last. Charles W. Young (NOAA: National Oceanic and Atmospheric Administration)H-Index: 7
view all 8 authors...
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#1Robert P. Dziak (NOAA: National Oceanic and Atmospheric Administration)H-Index: 31
#2Won Sang LeeH-Index: 9
Last. S.T. Yoon
view all 11 authors...
On 7 April 2016, the Nansen Ice Shelf (NIS) front calved into two icebergs, the first large-scale calving event in >30 years. Three hydrophone moorings were deployed seaward of the NIS in December 2015 and over the following months recorded hundreds of short duration, broadband (10-400 Hz) cryogenic signals, likely caused by fracturing of the ice shelf. The majority of these icequakes occurred between January and early March 2016, several weeks prior to the calving observed by satellite on 7 Apr...
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#1William S. D. Wilcock (UW: University of Washington)H-Index: 34
#2Maya Tolstoy (LDEO: Lamont–Doherty Earth Observatory)H-Index: 28
Last. Christian Baillard (UW: University of Washington)H-Index: 3
view all 7 authors...
In the Northeast Pacific Ocean, the NSF Ocean Observatories Initiative (OOI) and Ocean Networks Canada (ONC) operate regional cabled observatories that include a network of seismometers and hydrophones enclosing the northern half of the Juan de Fuca plate, and local observatories at two sites on the Juan de Fuca Ridge: Axial Seamount (OOI) and the Endeavour segment (ONC). At each ridge site, local networks of seismometers and hydrophones provide a tool to monitor in real time the seismic and aco...
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