Earthquakes | Exton Weather

Alaska – M5.2 – Jan 22, 2019 at 04:43:19 UTC

86km ESE of King Salmon, Alaska

Position: 58.321°N 155.356°W – Depth: 127.8 km

USGS Information Page

Distance from Exton PA: 51.9 Deg -5,772 Km – Azimuth: 73.6 Deg

SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA), LD.WUPA.BHZ, and LD.GEDE.BHZ (Greenville DE) showing the P wave arrivals. The P wave was very weak from this modest earthquake and only made a small blip. The RaspberryShake (R8C73) however captured the P wave better than either of the two broadband seismometers.

Chili – M6.7 – Jan 20, 2019 at 01:32:51 UTC

15km SSW of Coquimbo, Chile

Position: 30.074°S 71.423°W – Depth:53.0 km

USGS Information Page

Distance from Exton PA: 70.0 Deg -7,772 Km – Azimuth:356.6 Deg

Heliocorder trace of AM.R8C73.00.SHZ. The earthquake in in green near the bottom of the image.

Waveform of the P to S interval.

SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA), PE.PSUB.HHZ (Media PA), and LD.GEDE.BHZ (Greenville DE) showing the P wave arrivals.

Fault Plane Solution in SeisComP3.

Northern East Pacific Rise – M6.0 Jan 18, 2019 at 16:40:42 UTC

Northern East Pacific Rise

Position: 8.270°N 103.466°W – Depth: 10.0 km

USGS Information Page

Distance from Exton PA: 40.3 Deg – 4,475 Km – Azimuth: 33.7 Deg

SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA), LD.WUPA.BHZ (West Chester PA), and PE.PSUB.HHZ (Media PA), showing the P wave arrivals. Note the false pick from SeisComP3 for R8C73. This was most likely caused by local noise as the seismometer is not in a seismic vault.

SeisComP3 fault plane solution for this event.

Atlantic Ocean – M4.7 – Jan, 15, 2019 at 23:30:48 UTC

219km ESE of Ocean City, Maryland

Position: 37.240°N 73.007°W – Depth: 10.0 km

USGS Information Page

Distance from Exton PA:3.4 Deg – 383 Km – Azimuth:324.5 Deg

This earthquake occurred on the Atlantic Ocean floor in deep water east of the continental shelf. While quite close to our location, it was not felt here. Since the quake was centered on fairly young oceanic crust, seismic waves would not propagate as well as they would in other parts of eastern North America where rocks are old and hard.

Heliocorder trace of AM.R8C73.00.SHZ. The earthquake in in the lower lefthand side of the the image (in red).

SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA), LD.WUPA.BHZ, and PE.PSUB.HHZ (Media PA showing the P wave arrivals.

Fault Plane solution showing that this eathquake occurred along a NNW / SSE or WSW / ENE trending strike-slip fault.

Brazil – M6.8 – Jan 5, 2019 at 19:25:38 UTC

89km W of Tarauaca, Brazil

Position: 8.143°S 71.574°W – Depth: 575.3 km

USGS Information Page

Distance from Exton PA: 48.3 Deg – 5,358 Km – Azimuth: 354.8 Deg

Trace showing phase arrivals.

Heliocorder trace of AM.R8C73.00.SHZ showing this Event.

Unfiltered SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA), PE.PSUB.HHZ (Media PA), and LD.GEDE.BHZ (Greenville DE) showing the sharp impusive P wave arrival associated with this earthquake. The heliocorder trace above also displays the high amplitude P.

Fault Plane Solution for this event.

Jamaseis Heliocorder Traces of AM.R8C73.00.SHZ and PE.PSUB.HHZ. The broadband trace from PSUB shows surface waves present, but not at the amplitude that would be expected from an earthquake of this magnitude due to the deep focus (575 Km).