GNSGeodesy

We are the geodesy group at GNS (@ijhamling @gpsRuna @Nev_P @yunmengCao @betchamanma, Chris Rollins, and Laura Wallace). We use geodesy to track deformation!

[GeoNet @geonet]

Eagle-eyed visitors to our website will have spotted a slow-slip earthquake (SSE), that our GNSS instruments have located near Hawkes Bay during the month of June. Today we give an update on what’s been happening beneath our feet. 👀���https://t.co/ZckTykAivy #eqnz

[GNSGeodesy @GNSGeodesy]

@Jamienzherald @ThizzelleDregan Yep—Good spotting! Those spikes are a slow slip event that has occurred offshore Hawkes Bay and beneath Mahia Peninsula in the last few weeks. We’ve run a model on the event, and I think @geonet is planning to run a story on the event next week.

[Jamie Morton @JamieMortonNZ]

A sweeping Victoria University restructure has alarmed New Zealand’s tight-knit geoscience community – with one prominent earthquake scientist worried it could spell the loss of “world-renowned” expertise on our biggest natural hazards https://t.co/45q8xDxC2q

[GNSGeodesy @GNSGeodesy]

Oops meant to say *check out!

[GNSGeodesy @GNSGeodesy]

Yay 1.3M views! Glad that lots of people seem interested in the @HikurangiSZ ! If you haven’t already, out the short film about our research on this!

[Natural Hazards Commission Toka Tū Ake @EQCNZ]

The Hikurangi Subduction Zone short documentary has more than 1.3m views on @YouTube, covering the latest research into Aotearoa NZ’s largest and most active fault.
Watch it below, made in partnership with @gnsscience, @nzeastcoastLAB & @NZcivildefence.
https://t.co/5IwTTg0AsY

[GNSGeodesy @GNSGeodesy]

Some more info on the ongoing Manawatu slow slip event from @Jamienzherald !

[Jamie Morton @JamieMortonNZ]

Slow-motion earthquakes unfolding deep beneath the North Island have released the equivalent energy of a magnitude 7.2 rupture – with intriguing potential links to last month’s big Hawke’s Bay shakes https://t.co/NV6zebXICB

[GNSGeodesy @GNSGeodesy]

Our latest update of what the ongoing Manawatu slow slip event has been up to…this is one of our long term slow slip events on @HikurangiSZ (this event has lasted about a year and a half so far), and it has been going strong in 2023.

[GeoNet @geonet]

In January we investigated ongoing slow slip events that our sensors have been detecting beneath the North Island, in Kāpiti and Manawatū. Today we check in on this activity and explore a possible link to the recent Pōrangahau earthquake sequence. 👇https://t.co/dCjiL23VbT

[GNSGeodesy @GNSGeodesy]

@UKEQ_Bulletin Wow, I’m surprised that was your first public talk—you are a natural. Very engaging talk!

[GNSGeodesy @GNSGeodesy]

Really nice talk today⁩ from Jamie Gurney of ⁦@UKEQ_Bulletin⁩ fame, who spoke to us about the work he is doing ⁦@gnsscience⁩ for a few months to improve our understanding of historical New Zealand earthquakes! Still so much to learn from these old quakes!

[GNSGeodesy @GNSGeodesy]

A nice thread from @mckcarlson @PNSN1 on our recent expedition to @HikurangiSZ ! McKenzie will be joining us @UTGeophysics later this year to start PhD research on the pressure data we acquired to investigate offshore slow slip events! Looking forward to see what she discovers!

[PNSN @PNSN1]

Checking back in from Aotearoa New Zealand! We have finished our cruise along the Hikurangi Subduction Zone and are looking forward to diving into all the data we collected. But you might be wondering - what were we actually doing out there?

[GNSGeodesy @GNSGeodesy]

@warrenseismo Yep both instruments recorded good data until a few months after the 2021 porangahau slow slip event, and the sites are right on top of the sse source do these data are awesome to be able to get!!

[GNSGeodesy @GNSGeodesy]

A successful end to a very busy research cruise! ROV Jason rescued two bottom pressure recorders that we deployed in 2020, that weren’t responding when we came to retrieve them in 2021. So glad to finally get them back, and with some nice data as well!! #PULSEeqnz

[Emily Warren-Smith @warrenseismo]

And that's a wrap (literally) on #PULSEeqnz !!! 🙌🎉 Thanks to @EarthScope_sci #IrisPasscal for the loan of the equipment! It's headed back your way soon 🚢🌊

[GNSGeodesy @GNSGeodesy]

@Harold_Tobin @mckcarlson @txgeosciences Yes!!! @txgeosciences are so lucky and I’m excited to get to work with you!

[GNSGeodesy @GNSGeodesy]

A nice story @LiquidRobotics has put together on our recent Waveglider survey of GNSS-Acoustic arrays we have deployed offshore the eastern North Island to detect whether the offshore @HikurangiSZ is locked-up and building stress to be relieved in future earthquakes

[Liquid Robotics @LiquidRobotics]

“Being able to use a Wave Glider to survey in the positions of seafloor acoustic arrays [...] is really helping to break open a new frontier,” said Dr. Wallace @utsystem. #geophysics #marinescience #acoustics #USV @Scripps_Ocean @gnsscience @sonardyne https://t.co/HOHEhozsWY

[PNSN @PNSN1]

Ahoy from the R/V Thomas Thompson, @UW’s world-class research vessel, currently off the coast of NE New Zealand! Your friendly neighborhood PNSN social media person McKenzie here - I’ll be spending the next ~week on the Thompson doing Subduction Zone research. Follow along!

[GNSGeodesy @GNSGeodesy]

We are starting the process tonight of getting the temperature sensors and fluid sampler/flowmeter back into the splay fault @JRSO_IODP Site U1518 at the Hikurangi subduction zone!🤞🤞that it works and that we get some good data when we come to retrieve it in five years!!

[GNSGeodesy @GNSGeodesy]

@nich0lasBr0wn @JRSO_IODP @nich0lasBr0wn this a subseafloor observatory installed at the Hikurangi subduction zone (east of NZ) measuring changes in volumetric strain (via downhole pore pressure) and temperature during slow slip events on the subduction zone. We installed them in 2018 with @TheJR

[GNSGeodesy @GNSGeodesy]

Hello hello ⁦@JRSO_IODP⁩ Site U1519! Glad to see you’ve made some new friends in our two year absence, and the data we downloaded from you this morning sure is looking good!!

[GNSGeodesy @GNSGeodesy]

And here we are about to pull the top plug to retrieve the string of temperature sensors from the U1519 observatory. The temperature sensors are now on deck getting new batteries and will be redeployed back here in just a few days!