It’s 19112017 and over the past twelve hours, 3 progressively stronger earthquakes have occurred near Tadine, New Caldonia. Three events at 09:25, 15:09 and 22:43hrs UTC shook the islands with magnitudes M6.4, M6.6 and M7.0 (Mww). Station E1TX detected only the strongest earthquake, shown below and denoted by the red arrow.
CAN YOU HELP US ???
Over many weeks, you may have observed that there is a mysterious (and yet, curious) seismogram signature in the 15:00hr UTC (10:00 am CST). We don’t have a logical interpretation behind this recurring “event”. Below is this week’s series of screenshots from the seismograph. Here is what we DO know:
- It occurs consistently in the early part of the 15:00hr UTC
- Our personal sprinkler system does NOT run during that hour
- The neighborhood’s sprinkler system does NOT run during that hour
- The pool’s pumps do NOT run during that hour.
- Neighborhood construction begins before 13:00hrs UTC (08:00 am CST) and continues throughout the day on multiple lots – the “event” is only observed during the 15:00hrs UTC
- We live about 200 yrds from a large reservoir which has no circulation system
Any hypotheses are welcomed!
Over the last 24 hours, two very strong earthquakes have rocked the globe. On November 12, 2017 18:18hrs UTC a magnitude M7.3 and focal depth of 23kms earthquake occurred near the Iraq-Iran border, and 18hrs later on November 13, 2017 02:28hrs UTC and focal depth 20kms, a magnitude M6.5 earthquake shook Costa Rica. Both powerful events were recorded very clearly at Station E1TX. In the sesimograph screenshot below, the red arrow indicates the Costa Rica event and the Iraqi event is the earlier event. Each image in the slideshow has been captioned.
WATCH the Earth move LIVE
A very large earthquake hit Iraq-Iran border around 18:18 hrs UTC on November 12, 2017. The quake had powerful magnitude of M7.3 (Mww) and was approximately 23kms deep. Several seismic wave phases are easily see on this seismogram, including the large Surface Waves:
M7.3 Iraq 12Nov2018 18:18hrs UTC
Map of Iraqi Earthquake
Seismogram from Iraq
First Arrivals of the Seismogram from Iraq
This evening, Nov 10, 2017 at 5:26pm CST, an interpreted transform plate boundary experienced a magnitude M6.3 (Mww) earthquake. We wonder…. is this convergent-transform plate boundary creating new Earth crust? Near Ascension Island, a high seismically active area, the focal depth was shallow at 10kms deep and was approximately 88 polar degree away from Station E1TX.
TODAY’S TEACHABLE MOMENT from Station E1TX brings up an excellent question from students: I do not see (observe) any change or reaction, so why do I need to record this event in my journal? In science, the lack of an observation or “missing” data is valuable. The question posed leads to inquiry and further investigation of hypotheses. Example: if we did not observe a “P” wave on a seismogram recorded at Station E1TX, then we may infer the epicenter was approximately deg away from our location. What other information can “missing” pieces confirm or rule out ? Below is (1) the screenshot from E1TX’s seismograph, and (2) the extracted seismogram from the recorded data – can you find the M6.5 earthquake in Papua New Guinea?
A very large magnitude 6.8 (Mww) earthquake occurred today, November 4, 2017 at 09:00hrs UTC (04:00 am CST). Last month, a similarly large magnitude 6.0 (Mww) occurred near the same epicentral location – both offshore of Tonga. Both earthquakes had focal depths of 10kms. We interpreted both seismograms and compared the seismic wave phases – for purpose of scaling issues, we only show the first arrivals (P waves) of each event. For ease of visual comparison, note that the M6.0 event has a more compressed time scale compared to the 11-04-2017 M 6.8 event. We can begin to infer broad-scale geology, from Tonga to Texas, when we observe consistent patterns of seismic wave phases (again, shown here are the P waves’s arrivals).
SEE it LIVE !
This morning at 11:52hrs UTC (06:52 a.m. CST) a moderate M5.7 earthquake occurred offshore Mexico, near Tomatlan. The earthquake had a shallow focal depth of 10kms and is easily discernible on Station E1TX’s seismograph. Many seismic phases can be interpreted on the seismogram including P, PP, PPP, S and Surface waves.
Within the past 3 hours there have been 3 earthquakes at Earth’s North Pole. The moderate sized (mb ~ 5.7) events have been occurring at focal depths estimated at 10kms. The first two quakes can be interpreted as fore shocks of the third quake – interestingly, the first two quakes occurred within 3 minutes of each other. The events occurred at 16:13, 16:16 and 19:11hrs UTC. All three events were detected by Station E1TX and the last event at 19:11hrs UTC is the easiest to see on the seismogram (red arrow).
The last earthquake in a series of 3 at the North Pole
Three earthquakes within 3 hours at the North Pole