John Paul O'Donnell

Geophysicist

[Adrian Dipilato @AdrianDipilato]

Did Adelaide just have a earthquake? I took this 14 stories up in the city. 😬😬😬 #earthquake

[John Paul O'Donnell @JP0Donnell]

Today's Mansfield earthquake in Victoria as recorded on the seismograph in Government House, Adelaide. I clearly felt the vibrations at my desk in the Geological Survey of South Australia in Adelaide CBD.

[John Paul O'Donnell @JP0Donnell]

AusArray SA seismic squiggle harvest time in the WPA, South Australia. Thanks to Col Telfer from the @AusAirForce for the drone footage. @DEM_sagov @AuScope @GeoscienceAus

[John Paul O'Donnell @JP0Donnell]

@anna_chica Nope!

[John Paul O'Donnell @JP0Donnell]

Reduction in human-related seismic vibration (industry, planes, trains, automobiles,...) during the South Australian lockdown evident at AuScope seismic station GHSS located in Government House, Adelaide. Scale is nanometers (nm). Data processed & plotted using SeismoRMS.

[John Paul O'Donnell @JP0Donnell]

The vibrations from the M8.2 Alaska earthquake recorded at AuScope seismic station KELC on Kangaroo Island are gargantuan in comparison, even at a remove of 12,000+ km. 1 human hair = 75,000 nanometers (or so I'm told...).

[John Paul O'Donnell @JP0Donnell]

Late to the party, but... sonic boom from Hayabusa-2 capsule re-entry above South Australia as captured on four GSSA AusArray SA seismic stations @DEM_sagov @AuScope @GeoscienceAus @AusSpaceAgency @haya2e_jaxa

[John Paul O'Donnell @JP0Donnell]

@Tomo_wise @kate_selway @DEM_sagov @AuScope @GeoscienceAus A recovery power nap works wonders after digging those holes.

[John Paul O'Donnell @JP0Donnell]

Just finished the first service run of the GSSA's AusArray SA seismic network with @kate_selway and Bruce and Ann Goleby. Let's see what the data reveal... @DEM_sagov @AuScope @GeoscienceAus

[John Paul O'Donnell @JP0Donnell]

The Geological Survey of South Australia deployed the AusArray SA broadband seismic array over two weeks in October 2020. Two vehicles, with a cumulative 10,000+ km covered. Phew! Thanks to @AuScope and @GeoscienceAus for the instruments @DEM_sagov

[John Paul O'Donnell @JP0Donnell]

@ArcheanGeo @kate_selway It was a follow-up study...

On the Spheroid-bearing Granite of Mullaghderg, Co. Donegal
Frederick H. Hatch
Quarterly Journal of the Geological Society, 44, 548-560, 1 February 1888, https://t.co/eSZJDtu4A9

[John Paul O'Donnell @JP0Donnell]

@ArcheanGeo @kate_selway

[John Paul O'Donnell @JP0Donnell]

Rare orbicular #granite at Mullach Dearg beach, #Donegal

[John Paul O'Donnell @JP0Donnell]

@staciblevins @staciblevins Sure, no problem.

[John Paul O'Donnell @JP0Donnell]

Emerald Guitar, Emerald City, Oz... Happy St. Patrick's Day 🇮🇪 @EmeraldGuitars

[Emerald Guitars @EmeraldGuitars]

Meanwhile in #Antarctica .... Video Credit: @JP0Donnell More to come soon! #TheBeastFromTheEast #BeastFromTheEast #emeraldguitars #madeinireland #emeraldfamily #travel #travelblogger https://t.co/l7UcjDdQ2i

[graham stuart @grahamstuart_ld]

New Year over the Atlantic. On the way to retrieve the UKANET seismometers from West Antarctica LHR > São Paulo > Santiago > Punta > Rothera @BAS_News @IGTLeeds

[The Antarctic Report @AntarcticReport]

30 year drift from Ross Sea into Sth Atlantic! Iceberg B09D calved from Ross Ice Shelf in 1987! @icey_mark https://t.co/Ya42mSklEO @SanGasso

[USGS_Seismic @usgs_seismic]

Comprehensive video of seismic phases: https://t.co/16rC5UBW6K The picture is for P, PcP, Pdiff, PKP, PKiKP, and PKIKP