Ian G. Stimpson
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hypocentre.bsky.social
Ian G. Stimpson
@hypocentre.bsky.social
2.3K followers 610 following 260 posts
Seismologist, geophysicist, structural geologist, geoconservationist, not necessarily in that order.
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hypocentre.bsky.social
That’s a nice ring ditch you have there, it would be a shame if someone dug a powerline to a mobile phone mast through it. ⚒️🧪
GPR depth slice at around 1m down showing a blue circle highlighting a ring barrow ditch and a red linear feature from a powerline cutting the northeast part of the structure.
November 19, 2025 at 8:54 AM
hypocentre.bsky.social
So good to be outdoors supervising a GPR survey today, but why do I always get asked to do this stuff in winter rather than summer?

Historic landscape with spectacular views across the region. No wonder our forebears venerated this place.
Person pushing a radar kart across a green field.
November 18, 2025 at 4:39 PM
hypocentre.bsky.social
Enough is enough.
That’s your lot, you emerald strigiform nemesis.
Adiós para siempre, búho.
Duo lingo 2500 day streak
November 9, 2025 at 12:37 PM
hypocentre.bsky.social
P-waves from today’s (20:29:59 UTC 2025/11/02) M6.3 Hindu Kush Region, Afghanistan earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
November 2, 2025 at 9:00 PM
hypocentre.bsky.social
P-waves from today’s (19:48:29 UTC 2025/10/27) M6.0 Türkiye earthquakes recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
October 27, 2025 at 8:27 PM
hypocentre.bsky.social
P-waves from today’s (12:38:40 and 12:54:59 UTC 2025/10/27) M6.5 and M6.0 Leeward Islands earthquakes recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
October 27, 2025 at 3:26 PM
hypocentre.bsky.social
My suggestion is Charles Darwin, Geologist by Sandra Herbert.

Also, for history of science rather than just geology, The Lunar Men by Jenny Uglow (18th C Birmingham, UK Lunar Society - rather than NASA)
Cover of book Charles Darwin, Geologist by Sandra Herbert
October 10, 2025 at 7:35 AM
hypocentre.bsky.social
Dark red Namurian Chatsworth Grit bleached yellow by fluids (probably hydrocarbons) flowing through fault zones. Harston Wood, Froghall Wharf, Staffordshire Moorlands. ⚒️
Rock face in woodland. Dark red Namurian Chatsworth Grit bleached yellow by fluids (probably hydrocarbons) flowing through fault zones.
September 30, 2025 at 11:46 AM
hypocentre.bsky.social
Out doing reconnaissance for this Sunday’s Geologists’ Association @geolassoc.bsky.social annual conference field trip to the Staffordshire Moorlands.
Near-vertical calc-turbidities with an inverted olistolith of carbonate mudmound reef. Milldale Fm. Tournaisian. Brown End Quarry, Waterhouses. ⚒️
Quarry face with steep-dipping limestones and a large rounded block in upper right. Near-vertical calc-turbidities with an inverted olistolith of carbonate mudmound reef.
September 30, 2025 at 10:07 AM
hypocentre.bsky.social
P-waves from today’s (09:59:16 UTC 2025/09/28) M5.4 Türkiye earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
September 28, 2025 at 11:20 AM
hypocentre.bsky.social
… and its near twin M6.3 at 03:51:39 today (2025/09/25).
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
September 25, 2025 at 6:52 AM
hypocentre.bsky.social
P-waves from yesterday’s (22:21:55 UTC 2025/09/24) M6.2 Venezuela earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
September 24, 2025 at 11:47 PM
hypocentre.bsky.social
Start of my thirty-ninth year at Keele University.

First in the Department of Geology, then Department of Earth Sciences, then Earth Sciences and Geography, then School of Geography, Geology and the Environment, now School of Life Sciences.

Plus ça change, plus c'est la même chose.
My ‘home’ for the last thirty-eight years - the ‘Will Smith’, a building actually named after two William Smiths, one the Father of Stratigraphy, the other an earlier cartographer and drawer of town plans. My office is in the older, white part of the building to the left behind the metasequoia, the newer brick-faced part is on the right behind a low hedge. The university still hasn’t replaced the single-glazed windows with metal frames, that don’t shut properly, in all that time.
September 22, 2025 at 7:54 AM
hypocentre.bsky.social
P-waves from today’s (18:58:13 UTC 2025/09/18) M7.8 near east coast of Kamchatka earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
September 18, 2025 at 8:49 PM
hypocentre.bsky.social
P-waves from today’s (02:37:54UTC 2025/09/13) M7.4 near east coast of Kamchatka earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
September 13, 2025 at 6:41 AM
hypocentre.bsky.social
P- and S-waves from today’s (08:49:14 UTC 2025/09/07) M2.6 earthquake 27km depth beneath Pontefract, North Yorkshire, UK recorded on my @raspishake.bsky.social in Newcastle-under-Lyme, England (about 100km southwest of the event) ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 08:49:14 UTC 2025/09/07 M2.6 earthquake Pontefract, North Yorkshire, UK
September 7, 2025 at 12:51 PM
hypocentre.bsky.social
Team Stibnite. Antinomy sulphide. The old Greek name for the mineral “stibi” gave rise to the Latin “Stibium”, the former name of the element antimony (Sb). Sample from Baia Sprie, Romania. Cotton Collection, Keele University.
Black needle-like crystals of stibnite in grey gypsum. Cotton Collection, Keele University.
September 2, 2025 at 2:15 PM
hypocentre.bsky.social
P-waves from today’s (16:53:47UTC 2025/08/10) M6.1 western Türkiye earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 16:53:47UTC 2025/08/10 M6.1 western Türkiye earthquake
August 10, 2025 at 5:41 PM
hypocentre.bsky.social
The Times @thetimes.com should have got a geologist to review this diagram before publishing. I think I’m going to get my first year students to discuss all the things wrong with it.

From www.thetimes.com/article/9b50...
Schematic diagram of the formation of the Kamchatka tsunami from The Times with all sorts of issues.
July 30, 2025 at 2:18 PM
hypocentre.bsky.social
... and here is the helicorder plot from Keele University's SEP1 seismometer of the Kamchatka earthquake.
Helicorder plot of Kamchatka earthquake 2025/07/29 recorded at Keele University, UK. Each line is one hour of data
July 30, 2025 at 9:05 AM
hypocentre.bsky.social
P-waves from yesterday’s (23:24:50 UTC 2025/07/29) M8.8 Off East Coast Kamchatka earthquake recorded on my Raspberry Shake seismometer in Newcastle-under-Lyme, England plus M6.9 (00:09:53 2025/07/30) and M6.3 (00:16:03) aftershocks ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 23:24:50 UTC 2025/07/29 M8.8 Off East Coast Kamchatka earthquake Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. Off East Coast Kamchatka earthquake Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. Off East Coast Kamchatka earthquake
July 30, 2025 at 7:39 AM
hypocentre.bsky.social
P-waves pretty much through the centre of the Earth from today’s (22:10:32UTC 2025/07/28) M6.9 Macquarie Islands region earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 22:10:32UTC 2025/07/28 M6.9 Macquarie Islands region earthquake
July 28, 2025 at 11:00 PM
hypocentre.bsky.social
P-wave from today’s (01:29:02UTC 2025/07/25) M5.2 Azores earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 01:29:02UTC 2025/07/25 M5.2 Azores earthquake
July 25, 2025 at 11:10 AM
hypocentre.bsky.social
P-wave from today’s (06:49:01UTC 2025/07/20) M7.4 Kamchatka earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England.

The strong 25Hz line on the spectrogram is the washing machine.

⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 06:49:01UTC 2025/07/20 M7.4 Kamchatka earthquake
July 20, 2025 at 2:18 PM
hypocentre.bsky.social
P-wave from today’s (20:37:39UTC 2025/07/16) M7.3 Alaskan earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪
Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time. 20:37:39UTC 2025/07/16 M7.3 Alaska earthquake
July 16, 2025 at 9:26 PM