Mark Vanstone @wmvanstone@qoto.org

School Seismology activity book: https://namazu.unice.fr/pdf-cahier-sismo/sismo-collector-en.pdf is an English translation of a workbook from the French school seismology network. It looks very suitable for a secondary school / high school science club. The diagrams are still captioned in French.

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.

@planetkooler, welcome. Add a bio to your account, using # to mark key topics of interest. Favorites are nice, but Boost is the way to spread information around as there are not the same algorithms as elsewhere. If you look on my feed, I have boosted some etiquette advice about alt text on images and use of camel case in tags.

I should have acknowledged that the plot is a time frequency representation created using the plot_tfr function in #ObsPy.

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
.