Brian Baptie

The M3.6 quake in the Central Graben of the North Sea on 26 January is one of a number of M3+ events in the vicinity of the Elgin, Franklin and Shearwater fields in recent years including a M4.2 in 2019. @BGSseismology

Signals from suspected sonic boom in NE England recorded on BGS seismometers. Low apparent velocity across array is consistent with speed of sound for possible source over North Sea. @BGSseismology @BritGeoSurvey

The epicentre of the M3.3 quake in Scotland on 16/11/2021 was approx 25 km southwest of Scotland’s largest known quake. A M5.2 in 1880 that was felt throughout Scotland and N Ireland. Map shows historical seismicity.

BGS received over 100 reports from people who felt the M3.3 quake in Scotland on 16/11/2021. Intensities are calculated for 5 km squares. @BGSseismology @stevejgibbons

@EricFielding @BritGeoSurvey @BGSseismology Good question. Needs a closer look but I think these are sites where the background noise is very low anyway, so the increases just reflect the variability at those sites.

@BrianBaptieBGS @BritGeoSurvey @BGSseismology What is happening at those few stations where the RMS noise has increased?

Change in RMS amplitude of daytime seismic noise at BGS seismometers in the two weeks since start of Covid-19 lockdown compared with the rest of 2020. Most sites showing noise levels down by 20-50%. @BritGeoSurvey @BGSseismology

@seismotom @BritGeoSurvey @BGSseismology Great. Think there must be quite a few shakes in the uk now.

@BrianBaptieBGS @BritGeoSurvey @BGSseismology Of course! And worth comparing with the bunch of raspishakes in UK! See you in Slack then (will email you the link tomorrow)

@seismotom @BritGeoSurvey @BGSseismology Yes! Very happy to share data and results with you if it would be useful.

@BrianBaptieBGS @BritGeoSurvey @BGSseismology Great!!! Did you see our call to join forces to write a common paper on al this?

Here is an updated version of the shakemap for yesterday’s small earthquake in Teesside.

Strength of shaking for yesterday’s small earthquake in Teesside. Intensities were determined from information provided by over 800 people.

Map showing earthquake activity over last few hundred years around Grimsby. Star shows epicentre of last nights quake. @BritGeoSurvey @BGSseismology

This map show where last night’s quake near Grimsby was felt and how strongly. Max intensity 5 EMS. Felt as far away as York. @BritGeoSurvey @BGSseismology

@BritGeoSurvey @BGSseismology twitter.com/brianbaptiebgs…

This map show where last night’s quake near Grimsby was felt and how strongly. Max intensity 5 EMS. Felt as far away as York.

Intensity of shaking experienced by people across the UK from the magnitude 4.4 earthquake in South Wales on 17/02/2018. @BritGeoSurvey @BGSseismology

Peak ground velocities recorded by seismometers across the UK from the magnitude 4.4 ML earthquake in South Wales on 17/02/2018. @BritGeoSurvey @BGSseismology

Ground motions from the South Wales quake recorded at BGS seismic stations across the UK. Records show ground displacement in nanometers and are ordered by distance. The waves take about 10 seconds to reach the closest station, 60 km away. @BritGeoSurvey @BGSseismology

Updated info on yesterday’s quake at earthquakes.bgs.ac.uk/earthquakes/re… includes this map showing where the earthquake was felt @BGSseismology @BritGeoSurvey

South Wales has experienced a number of M5+ quakes over the last 200 years. @BritGeoSurvey @BGSseismology

@BGSseismology installing seismometers in Cumbria as part of #UKArray youtu.be/y7_b78Y97oE @BritGeoSurvey