Bill Minarik · @silicatefondue
134 followers · 314 posts · Server fosstodon.org

@hypocentre ...and the signal from three geophones located in . We're just over six minutes travel-time away. Urban noise >4Hz filtered out.

#raspberryshake #montreal #urbanseismology

Last updated 1 year ago

Bill Minarik · @silicatefondue
76 followers · 119 posts · Server fosstodon.org

The Magnitude 7.8 earthquake in Turkey 05Feb23 EST, as detected in Montreal.

Big and shallow; affecting both Turkey and Syria.

#raspberryshake #urbanseismology

Last updated 2 years ago

Bill Minarik · @silicatefondue
56 followers · 70 posts · Server fosstodon.org

@geo_garver ...and it shook basements (imperceptibly): the geophone records vertical motion, here in microns per second.

#montreal #raspberryshake #urbanseismology

Last updated 2 years ago

Bill Minarik · @silicatefondue
52 followers · 65 posts · Server fosstodon.org

@stevenjgibbons For comparison, here's the record of a large explosive event in North Korea in September 2017, recorded by the network.

Of course, is at the center of the Earth!

#raspberryshake #montreal #urbanseismology

Last updated 2 years ago

Bill Minarik · @silicatefondue
52 followers · 65 posts · Server fosstodon.org

Part of a trace showing a small earthquake just off the west end of , ~18 km from a . It occurred at ~5 am, 07Jan22, mag 2.4 mb_lg. The day/night contrast of city noise is also clear!

#montreal #raspberryshake #urbanseismology

Last updated 2 years ago

Bill Minarik · @silicatefondue
14 followers · 36 posts · Server fosstodon.org

@Weston_Quakes I've added two traces from . Mag. 5.4 ml EQ near Midland Texas on 16Dec22. Normal fault striking NE-SW.

#raspberryshake #montreal #urbanseismology

Last updated 2 years ago

Bill Minarik · @silicatefondue
1 followers · 3 posts · Server fosstodon.org

Two recordings of the Reno, Alberta mainshock of 29 Nov 2022 (mag 5.1 Mw), both from the west side of Montreal (3,190 km distance). Top trace of each is unfiltered, bottom is low-pass filtered to remove urban noise.
Top geophone (R9499) is on clay substrate in a busier location. Plotted using USGS Swarm.

#raspberryshake #urbanseismology

Last updated 2 years ago

Bill Minarik · @silicatefondue
1 followers · 3 posts · Server fosstodon.org

Find the earthquake in the Montreal area (15Nov22, magnitude 3.0 mb_lg, 3.5 MN).

#raspberryshake #urbanseismology

Last updated 2 years ago