Mark Vanstone @wmvanstone@qoto.org

Earthquakes: Cross-correlation detector in #ObsPy is used to match a template from one seismic event to a longer trace from a seismometer, returning events which correlate above a user-defined threshold. Applying this to
#RaspiShake RD884, in Constantine, Cornwall, UK at a threshold of 0.80, I have identified 33 separate events in a swarm of multiplets (or repeaters) from the last week, identical earthquakes produced repeatedly from the same source. 12 of the events from this swarm have also been reported by #BGSSeismology. The largest event has a magnitude of 1.7, so they are all very small, although the M1.7 event was felt at the surface. The #ObsPy tutorial I followed is here: https://docs.obspy.org/master/tutorial/code_snippets/xcorr_detector.html and
#BGSSeismology report the swarm here: https://earthquakes.bgs.ac.uk/earthquakes/recent_uk_events.html.

A M5.8 #Earthquake 14 km NW of Ciranjang-hilir, Indonesia at 2022-12-08 00:50:58UTC recorded at 109.3° away in SW England and Brittany on #Raspishake and #BGSseismology networks, in the core shadow zone. See: https://earthquake.usgs.gov/earthquakes/eventpage/us6000j7r0/executive. Uses #obspy, #matplotlib & #folium libraries.

Surface waves from a M6.9 #Earthquake near Bengkulu, Indonesia at 18/11/2022 13:37:09UTC, received in the UK ~11500 km away approximately an hour after the earthquake on #BGSSeismology and #Raspishake devices. The frequency of these waves is shown on a plot from the BGS Elmsett seismometer. @PoLaRobs

Two tiny #Earthquakes reported in #Cornwall, UK, on 2022-10-25 in Penpol on the Fal estuary and 2022-10-26 near Portreath on the north coast. Responses were seen on the local #Raspishake network. See: https://earthquakes.bgs.ac.uk/earthquakes/recent_events/20221025184145.html#page=summary & https://earthquakes.bgs.ac.uk/earthquakes/recent_events/20221026192120.html#page=summary. Uses #ObsPy & #MatPlotLib.

M5.2 #Earthquake 23 km ENE of Dipayal, Nepal at 2022-11-12 14:27:05UTC recorded on the Nepali Schools #RaspberryShake network in Nepal. See: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ipbc/executive. Uses #ObsPy, #MatPlotLib & #GoogleEarthPro.

Responses to today's M7 earthquake from the Fiji region at 2022-11-12 07:09:14UTC recorded in SW England and Brittany, France on the
#raspishake and #BGSseismology networks. See: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ip8h/executive. Uses #obspy, #matplotlib & folium libraries.

Selected responses across the British Isles to today's M7 earthquake in Fiji 2022-11-12 07:09:14UTC recorded on #raspishake citizen science seismometers, plotted using #obspy, #matplotlib, folium.

Section from today's M7 earthquake in the Fiji region at 2022-11-12 07:09:14UTC recorded across the globe on the #raspishake citizen science seismometer network. See: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ip8h/executive. Uses #obspy, #matplotlib
.

Today's M7.3 Tonga region earthquake at 2022-11-11 10:48:45UTC recorded in the British Isles on the #raspishake #seismometer network. See: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ip0l/executive. Uses #obspy, #matplotlib & folium libraries. Waves travelled via the core.

Section from today's M7.3 earthquake in the Tonga region at 2022-11-11 10:48:45UTC recorded on the worldwide #raspishake
network. See: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ip0l/executive. Uses #obspy and #matplotlib.