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# LIGO events and the Moon Position

There are several coincidences among these events.

4 GW events were nearly coincident with a new moon (within 2 days).

2 events nearly coincided with a full moon (within 2 days).
2 events nearly coincided with a perigee (within 1 day).

That is 8 out of 16.

2 other events were within 5 days of a perigee.

There was only one GW event that was not within 6 days of a moon event.

Wikipedia has a list of each GW event date and time

The event names have the format: GWyymmdd
where GW150914 event is on 2015-09-14.

Here are those dates and the nearest full or new moon: FM or NM or PG (Perigee)

Events         phases within a few days?

GW150914  NM-15-09-13 1=close
GW151012  NM-15-10-12 0=match
GW151226  FM-15-12-25 1=close
GW170104  FM-16-12-13 22=no   PG- 17-04-10 6=?
GW170608  FM-17-06-09 1=close
GW170729  NM-17-07-23 6=?       PG-17-07-21 8=no
GW170809  FM-17-08-07 2=near
GW170814  FM-17-08-07 7=no     PG-17-08-18 4=?
GW170817  NM-17-08-21 4=?  PG-17-08-18 1=close
GW170818  NM-17-08-21 3=?  PG-17-08-18 0=match
GW170823  NM-17-08-21 2=near
S190408      NM-19-04-05 3=?  PG-17-08-18 10=no
S190412    NM-19-04-05 7=no  PG-17-04-16 4=?
S190421    FM-19-04-05 6=no  PG-17-04-16 5=?
S190425     FM-19-04-05 20=no  PG-17-04-16 9=no
S190503     NM-19-05-04 1=close

difference of 0 days is a match, 1-2 is close, 3-6 is questionable, >6 is too far.

When I did this exercise I expected no frequent correlations between any moon positions and the gravitational wave events.

I am quite surprised by several coincidences.
A new moon puts maximum tidal stress on Earth's crust, with the Sun also aligned. A perigee also does an earth tide regardless of the Sun.

That is only 8 out of 16 with a possible connection, though a few others were within a few days of a moon event.

Only the event S190425 is not within 6 days of a moon event.

From Wikipedia:
'
Earth tide is the displacement of the solid earth's surface caused by the gravity of the Moon and Sun. Its main component has meter-level amplitude at periods of about 12 hours and longer.
'

With the Moon at such a distance I do not know how many days cover most of its significant crust distortion. Maybe it takes only a day or two to relax. I was surprised by its meter-level amplitude.

This observation is probably a random coincidence of dates.

I really can't argue if someone says you can always find some possible pattern between sets of numbers.

In any case, I find this observation interesting. I leave it to the reader to their interpretation.

I checked for these coincidences simply because LIGO was designed to detect any disturbance in Earth's crust from a theoretical gravitational wave. The Moon is known to disturb Earth's crust and oceans.

If this observation is valid: this is funny if LIGO did not always account for the lingering effects of the nearby moon.

This post replaces my post on May 8 on this topic where I neglected the perigee events.

I added this comment after posting.
'
Another coincidence: GW170104 had no close lunar event. That date had the perihelion. That was the only GW event in January.
'