New Caledonia – M6.3 – Sept 10, 2018 at 19:31:37 UTC

Position:22.027°S   170.129°E – Depth: 12 km

USGS Information Page

The top trace is for G.DZM.00.BHZ on New Caledonia showing the quake from a point near the epicenter. The bottom two traces are for AM.R8C73.00.SHZ (Exton PA), and LD.GEDE.BHZ (Greenville DE).

Jamaseis trace for AM.R8C73.00.SHZ (Exton PA) and LD.GEDE.BHZ (Greenville DE). The P wave arrivals are not easily seen on either trace. However prominent surface waves can be seen for LD.GEDE.BHZ.

Distance: 122.4 deg, 13,587 km

Azimuth: 55.7 deg

L’Esperance Rock – New Zealand – M6.9 – Sept 10, 2018 at 04:19:02 UTC

Position:31.842°S   179.334°W – Depth: 111.1 km

USGS Information Page

 

SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA) and LD.GEDE.BHZ (Greenville DE) showing the P wave arrivals. The signals are both extremely weak despite the magnitude of this event. This is due to both stations being in the middle of the shadow zone (at 119 deg).

Distance: 119.7 deg, 13,289 km

Azimuth: 58.9 deg

SeisComP3 focal mechanism plot for this earthquake.

Solomon Islands – M6.5 – Sept 9, 2018 at 19:31:34 UTC

Position: 10.008°S   161.533°E – Depth: 64.5 km

USGS Information Page
Jamaseis heliocoder trace of AM.R8C73.00.SHZ and PE.PSUB.HHZ. The P wave arrivals are annotated. At this distance direct S waves are not present as they cannot pass through the liquid outer core. As a result there isn’t much to see on R8C73 as it is mostly sensitive to the higher frequency body waves (P and S). On PSUB however you can see long period surface waves starting at about 20:02. These continue for another 90 minutes.
Distance: 145.9 Deg. 16,230km
Azimuth: 27.4 Deg.
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.

Distance: 121.6 Deg, 13,504 km

Azimuth: 48.9 Deg

Pennsylvania – M2.9 – Sept 7, 2018 at 18:07:39 UTC

Position: 41.49 deg N, 77.36 W – Depth: 0 km
Normally such a small earthquake wouldn’t turn up here, but it is semi-local and these small quakes don’t always show up in the USGS listings (this one didn’t).

SeisComP3 display showing the station that recorded this event.
SeisComP3 traces for PE.PALR.HHZ (Geleton PA, the closest seismometer to the quake), AM.R8C73.00.SHZ (Exton PA) and LD.WUPA.BHZ (West Chester University, West Chester PA).

Distance (to Exton PA): 2.0 deg, 220 km

Arimuth: 137.4 deg

Ecuador – M6.2 – Sept 7, 2018 at 02:12.04 UTC

Position:2.345°S   78.896°W – Depth: 93.5 km
USGS Information Page

Jamaseis heliocoder trace of AM.RC8C73.00.SHZ (Exton PA) and LD.GEDE.BHZ (Greenville DE). The wavy trace on LD.GEDE.BHZ is due to surface waves from the Fiji earthquake earlier in the day.

Distance: 42.4 Deg. 4,703 km
Azimuth: 3.7 Deg.

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