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J H Gurney

@jhgurneyquakes

PhD Student at University of Canterbury, NZ. Historical seismologist, United Kingdom & Aotearoa New Zealand. Love history, botany, books, fantasy, science fiction & sports

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31.10.2023
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Latest posts by J H Gurney @jhgurneyquakes

Radical parties of the right and left in top two slots. Legacy parties getting only a third of the vote between them.

A whole new world.

03.03.2026 07:18 πŸ‘ 140 πŸ” 32 πŸ’¬ 23 πŸ“Œ 3
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Luminescence dating confirms Roman-era gold mines in the Eastern Pyrenees A study by the UAB and the University of A CoruΓ±a has succeeded in demonstrating the existence of Roman-era alluvial gold mines in the Eastern Pyrenees. The discovery was made possible by dating two s...

Luminescence dating confirms Roman-era gold mines in the Eastern Pyrenees. #Archaeology
phys.org/news/2026-02...

01.03.2026 09:31 πŸ‘ 67 πŸ” 14 πŸ’¬ 1 πŸ“Œ 1
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In 2023, a pair of earthquakes rocked TΓΌrkiye. But are there similar paired events that occurred in this region in the past? A new #SRL paper explores a seismic sequence from 1114-1115 CE through the lens of the 2023 events. βš’οΈ

buff.ly/fqebL10

01.03.2026 03:00 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Signal on seismic station AU.FITZ from a Malaysian earthquake February 22, 2026.

Magnitude 7.1 #earthquake just over an hour ago off the coast of #Malaysia (2026-02-22Z16:57) The good news is that it is deep (over 600 km) which greatly reduces the harm it can cause.
Signal on station AU.FITZ (Fitzroy Crossing, Australia, courtesy of Geoscience Australia)
https://earthquake.usgs.gov/earthquakes/eventpage/us6000sasz/executive

Signal on seismic station AU.FITZ from a Malaysian earthquake February 22, 2026. Magnitude 7.1 #earthquake just over an hour ago off the coast of #Malaysia (2026-02-22Z16:57) The good news is that it is deep (over 600 km) which greatly reduces the harm it can cause. Signal on station AU.FITZ (Fitzroy Crossing, Australia, courtesy of Geoscience Australia) https://earthquake.usgs.gov/earthquakes/eventpage/us6000sasz/executive

Magnitude 7.1 #earthquake an hour ago off the coast of #Malaysia (2026-02-22Z16:57) The good news is that it's deep (over 600 km) which greatly reduces the harm it can cause.
Signal on station AU.FITZ (Fitzroy Crossing, Australia, courtesy of Geoscience Australia)
earthquake.usgs.gov/earthquakes/...

22.02.2026 18:02 πŸ‘ 11 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

A thread for the 15-year anniversary of the 2011 Christchurch earthquake. I won’t have a chance to post it on the day, so I’m doing it a couple days early. Note that the work I’m posting was carried out by many brilliant people. 1/

20.02.2026 01:27 πŸ‘ 34 πŸ” 17 πŸ’¬ 3 πŸ“Œ 1
A squash field with a dirt road running across it. On the dirt road are two men, one arms crossed looking across the squash field, another walking back towards a parked car looking at a device. In the background are a low range of hills with grey cloudy skies above, and a small stand of poplar trees stands further back in the squash field.

A squash field with a dirt road running across it. On the dirt road are two men, one arms crossed looking across the squash field, another walking back towards a parked car looking at a device. In the background are a low range of hills with grey cloudy skies above, and a small stand of poplar trees stands further back in the squash field.

It was fantastic to join you, thank you @aotearoa-unzpd.bsky.social for organising & driving me up to, around & back from rural Hawke’s Bay!

Two seismologists in a squash field feels like the opening to an odd joke πŸ˜…

19.02.2026 23:11 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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I'm stoked to have delivered the Annual Art Deco science talk in Napier commemorating the 1931 Hawke's Bay quake and rebuild. #eqnz. This time focusing on the 1863 Waipukurau quake. Thanks also to @jhgurneyquakes.bsky.social for joining me

19.02.2026 21:33 πŸ‘ 9 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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research-er.jp/articles/vie...
"Accumulation of "strain" along the Kuril Trench confirmed by seafloor observations - Possibility of imminent recurrence of megathrust earthquake off the coast of Hokkaido since the 17th century"

"imminent" may be months, to years, to decades imo

18.02.2026 16:42 πŸ‘ 8 πŸ” 3 πŸ’¬ 1 πŸ“Œ 2
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On February 3, 1931, a 7.8 magnitude earthquake struck Hawke’s Bay, causing a mass loss of life & leaving thousands injured.

The earthquake struck at 10.47am, leading to the loss of 256 lives - 161 in Napier, 93 in Hastings & two in Wairoa.

We remember this event 95 years ago today.

02.02.2026 21:47 πŸ‘ 17 πŸ” 7 πŸ’¬ 1 πŸ“Œ 1
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First day of the field trip along the 1976 M7.5 Guatemala earthquake, Patadays 2026

31.01.2026 03:35 πŸ‘ 11 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
Photo from USGS

Photo from USGS

Kilauea erupted again yesterday in a fierce display. In only the 2nd time in 40 years, park officials closed the area due to the intensity.

Fountains were officially recorded at 500 m high, grapefruit size tephra were being ejected, and tephra fall was measured up to 20 miles away.
#volcano #hawaii

25.01.2026 13:52 πŸ‘ 1221 πŸ” 213 πŸ’¬ 29 πŸ“Œ 25
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Early news about the 22 January 2026 landslide at Mount MaunganuiΒ in New Zealand - Eos On 22 January 2026, a landslide was triggered by heavy rainfall at Mount MaunganuiΒ in New Zealand. Six people are missing.

On 22 January 2026, a landslide was triggered by heavy rainfall at Mount MaunganuiΒ in New Zealand. Six people are missing. Two more people are confirmed to have been killed by a landslide at Papamoa.
eos.org/thelandslide... #landslide #mountmaunganui

22.01.2026 08:12 πŸ‘ 20 πŸ” 13 πŸ’¬ 2 πŸ“Œ 2
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The Greenlandic government to Greenlanders: prepare for an invasion, and don't be put off by his statement at Davos that he doesn't intend to invade

21.01.2026 16:28 πŸ‘ 380 πŸ” 195 πŸ’¬ 20 πŸ“Œ 32
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A fast moving coronal mass ejection (CME) means the northern lights may be visible overnight, and perhaps on Tuesday night too

The arrival time of the CME is uncertain, but aurora sightings are possible in northern Britain and perhaps in southern areas depending on cloud cover.

19.01.2026 17:51 πŸ‘ 77 πŸ” 34 πŸ’¬ 3 πŸ“Œ 11
Picture of the Sun producing a solar flare. Text: "SEVERE GEOMAGNETIC STORM PREDICTED: Prepare your cameras! NOAA says that a severe G4-class geomagnetic storm is possible on Jan. 20th when a CME is expected to slam into Earth's magnetic field. The CME was launched on Jan. 18th by an X1.9-class solar flare from sunspot 4341:"

Picture of the Sun producing a solar flare. Text: "SEVERE GEOMAGNETIC STORM PREDICTED: Prepare your cameras! NOAA says that a severe G4-class geomagnetic storm is possible on Jan. 20th when a CME is expected to slam into Earth's magnetic field. The CME was launched on Jan. 18th by an X1.9-class solar flare from sunspot 4341:"

The CME is forecast to strike "during the early hours of Jan. 20th.. could spark auroras visible to the naked eye in at least a dozen northern-tier US states. Photographic auroras with colors visible only to cameras could descend as far south as AZ, TX and southern CA. spaceweather.com

19.01.2026 17:56 πŸ‘ 19 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1

@alomaxnet.bsky.social Hi Anthony. Just wanted to ask what happened with your Early-Est website? I noticed it stopped working in early October & hasn't been going since. I find it such a valuable resource!

14.01.2026 20:27 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1
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β€˜Extraordinary’ iron age war trumpet find in Britain may have Boudicca links Bronze instrument or carnyx dug up in Norfolk in area inhabited by Celtic tribe led by warrior who fought Romans

The new carnyx from Norfolk is the most complete ever found, & I can’t wait for the first reproduction to appear & be played. But it wasn’t alone! Also incredibly rare boar standard & shield bosses were deposited with it!
5/..

www.theguardian.com/science/2026...

07.01.2026 09:34 πŸ‘ 174 πŸ” 20 πŸ’¬ 2 πŸ“Œ 0
Rock avalanche below Mt King George triggered by the 6 December 2025 Hubbard Glacier Earthquake. The runout distance is 1.4 km.

Rock avalanche below Mt King George triggered by the 6 December 2025 Hubbard Glacier Earthquake. The runout distance is 1.4 km.

A sensational guest post by Derek Cronmiller, Theron Finley Panya Lipovsky and Jan Dettmer of the Yukon Geological Survey: Photos and Preliminary Observations from an Overview Flight of the 6 December 2025 Hubbard Glacier Earthquake, Yukon Territory, Canada.
eos.org/thelandslide...

05.01.2026 07:36 πŸ‘ 89 πŸ” 39 πŸ’¬ 1 πŸ“Œ 6
Screenshot of my raspishake seismometer signal

Screenshot of my raspishake seismometer signal

I got a very nice signal of the M2.3 #earthquake near Roermond, NL, this early morning. My Raspishake is 100km away from the epicenter. βš’οΈπŸ§ͺ @raspishake.bsky.social

05.01.2026 10:22 πŸ‘ 15 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

I'm near Portsmouth and we have a light dusting of snow on the ground. A bit unexpected, but might take a while to melt! Not forecast to get about 0Β°C until midday here!

05.01.2026 09:33 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Ammonite survival across the Cretaceous–Paleogene boundary confirmed by new data from Denmark - Scientific Reports We provide a reassessment of the hypothesis of ammonite survival across the Cretaceous–Paleogene (Maastrichtian–Danian) boundary, based on new data from the lower Danian Cerithium Limestone Member at ...

Ammonite survival across the Cretaceous–Paleogene boundary confirmed by new data from DenmarkπŸ‘‡βš’οΈ
www.nature.com/articles/s41...

02.01.2026 12:32 πŸ‘ 20 πŸ” 5 πŸ’¬ 2 πŸ“Œ 1
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31 December 1899 10:50 UT
Mw6.2 earthquake hit Akhalkalaki, southern Georgia, destroying villages and killing 800 people. Also felt in Armenia, Azerbaijan and Turkey. M5.8 EQ near in 1986 but less damaging.
openlibrary.ge/bitstream/12...
doi.org/10.1029/89EO...
newspapers.library.wales

31.12.2025 13:14 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Two slope maps of the bathymetry around the Noto Peninsula and Sado Island highlighting the location of a nearshore scarp.

Two slope maps of the bathymetry around the Noto Peninsula and Sado Island highlighting the location of a nearshore scarp.

The EQ faults (& scarp) are drowned by the current high stand. Nearby Sado Island shares similar deformation record and is flanked by a similar nearshore scarp. It is the potential location of a large fault system initially suggested by Ota Yoko in 1992 (she was 🎯). 2/3

19.12.2025 16:11 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
Map of the Noto Peninsula and Sado Island in Central Japan

Map of the Noto Peninsula and Sado Island in Central Japan

We'd have loved to share this at #AGU25
With marine terraces (4767 platforms πŸ–±οΈπŸ’ͺNina!) spanning the last Myr we show that the faults of the Noto Peninsula EQ started slipping around 300 ka. A landscape evol. model explains the transient topography of the peninsula. 1/3
doi.org/10.1029/2025...

19.12.2025 16:11 πŸ‘ 13 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
Landslides on the arete between Mt Vancouver and Mt Logan. Elevation difference between the central peak and the glacier is 500 m.

Landslides on the arete between Mt Vancouver and Mt Logan. Elevation difference between the central peak and the glacier is 500 m.

Large landslides on the southwest side of Mt King George. The main debris lobe on the right is approximately 1000 m wide. The elevation difference between the peak and glacier is approximately 1900 m.

Large landslides on the southwest side of Mt King George. The main debris lobe on the right is approximately 1000 m wide. The elevation difference between the peak and glacier is approximately 1900 m.

Landslides on the west side of Mt King George. The central debris lobe is 500 m wide.

Landslides on the west side of Mt King George. The central debris lobe is 500 m wide.

Large landslide on the southwest side of Mt King George. The main debris lobe is 1800 m wide, and material traveled approximately 6 km from the source area.

Large landslide on the southwest side of Mt King George. The main debris lobe is 1800 m wide, and material traveled approximately 6 km from the source area.

On FB, Yukon Geological Survey posted some spectacular photos of landslides & snow avalanches triggered by the magnitude 7.0 earthquake on Dec 6 in the St Elias Mountains. Here are some of my favs. @geocron.bsky.social @theronfinley.bsky.social @davepetley.bsky.social @ksvenenvig.bsky.social πŸ§ͺβš’οΈ

15.12.2025 22:44 πŸ‘ 391 πŸ” 117 πŸ’¬ 12 πŸ“Œ 6

Well separated SE & NW epicenter clusters, and change from ~strike-slip in SE to ~thrust in NW in USGS finite-fault & moment tensors, suggests double-event rupture. Or smooth, single rupture, with largest slip between the two clusters, on a curved fault, as suggested by @berndandeweg.bsky.social.

14.12.2025 14:56 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Epicenter map of NLL-SSST-coherence relocated seismicity (events with location error ≀ 10 km) for the period 2020 to 13 Dec 2025 in the area surrounding the M7 Dec 6 #Alaska #Yukon Hubbard Glacier #earthquake sequence (yellow). Pink lines show Quaternary faults from https://www.usgs.gov/programs/earthquake-hazards/faults

Epicenter map of NLL-SSST-coherence relocated seismicity (events with location error ≀ 10 km) for the period 2020 to 13 Dec 2025 in the area surrounding the M7 Dec 6 #Alaska #Yukon Hubbard Glacier #earthquake sequence (yellow). Pink lines show Quaternary faults from https://www.usgs.gov/programs/earthquake-hazards/faults

Epicenter map of NLL-SSST-coherence relocated seismicity (events with location error ≀ 10 km) for the period 2020 to 13 Dec 2025 in the area surrounding the M7 Dec 6 #Alaska #Yukon Hubbard Glacier #earthquake sequence (yellow). Pink lines show Quaternary faults from https://www.usgs.gov/programs/earthquake-hazards/faults

Epicenter map of NLL-SSST-coherence relocated seismicity (events with location error ≀ 10 km) for the period 2020 to 13 Dec 2025 in the area surrounding the M7 Dec 6 #Alaska #Yukon Hubbard Glacier #earthquake sequence (yellow). Pink lines show Quaternary faults from https://www.usgs.gov/programs/earthquake-hazards/faults

NLL-SC relocation of M7 Dec 6 #Alaska #Yukon Hubbard Glacier #earthquakes and seismicity since 2020. UPDATED with events through Dec 13. See earlier in thread for details and discussion.
Relocation catalog: zenodo.org/records/1792...

14.12.2025 14:56 πŸ‘ 1 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1
Focal mechanisms from moment tensor solutions for the first year after the Kaikoura earthquake. The mainshock solution is from the USGS as the earthquake was too large to calculate a regional moment tensor solution.

Focal mechanisms from moment tensor solutions for the first year after the Kaikoura earthquake. The mainshock solution is from the USGS as the earthquake was too large to calculate a regional moment tensor solution.

Focal mechanisms were mainly strike-slip or reverse faulting, consistent with shallow crustal faults in the region. The mainshock is shown as reverse faulting, but the entire rupture was much more complex than this. 16/

12.12.2025 02:53 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Seismicity in the Kaikoura region in the year prior to the Kaikoura earthquake.

Seismicity in the Kaikoura region in the year prior to the Kaikoura earthquake.

Aftershocks for the first year following the Kaikoura earthquake. Orange stars are M 6+ aftershocks and the Kaikoura epicentre.

Aftershocks for the first year following the Kaikoura earthquake. Orange stars are M 6+ aftershocks and the Kaikoura epicentre.

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Before the earthquake there was regular seismicity in the region with ~700 earthquakes recorded in the previous year. In the first year post-Kaikōura, more than 18 000 aftershocks were recorded, six with M 6+ (orange stars). 15/

12.12.2025 02:53 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
Kaikoura tide gauge (KAIT) showing a maximum amplitude of ~2 metres and peak-to-trough of ~3 metres.

Kaikoura tide gauge (KAIT) showing a maximum amplitude of ~2 metres and peak-to-trough of ~3 metres.

Among the faults that ruptured were several offshore faults which caused a tsunami along the NE coast of the South Island with a run-up of up to 6.9 m. The Kaikōura tide gauge recorded a tsunami with a max amplitude of ~2 m and peak-to-trough of ~3 m. 12/

12.12.2025 02:53 πŸ‘ 1 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0