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LIGO Events and Earth Tide Ripples

LIGO was designed to detect a tiny ripple in Earth's crust caused by a gravitational wave.
There are coincidences between LIGO detections and earth tide events. From this observation, the ripple from an Earth tide is triggering a response in the LIGO system looking for a small signal in the noise, the ripple in the crust from a gravitational wave.
The LIGO system uses templates for 4 event types  to detect; they are binary inspiral events. Each report is one of these 4 types.

The reliability of the LIGO system depends on the accuracy of this pattern matching software.
None of the templates has been validated by a test of the actual event.

The celestial events causing an earth tide in this time period: Full Moon, New Moon, PeriGee, PeriHelion, MJ = Moon-Jupiter alignment.

On 2019-04-23 was an alignment separation of the Moon and Jupiter of only 1 degree, 38 minutes, at the same RA. This is the MJ event.

More than one LIGO event has been detected in the ripples from one earth tide event. There are more LIGO events than earth tide events in the following list.


There are 43 LIGO events associated with 22 earth tide events.

There are 11 robust GW events (with a higher probability of a match) in the LIGO list of 38. 32 are marginal.

This list has the LIGO events in chronological order but preceded by the associated earth tide event. LIGO events can be reported before or after the earth tide event whose effect is over a span of time.

The lines starting with GW or S are the LIGO events.

GW150914 _ event 1 day after NM

GW151012 _  same day as NM

GW151226 _ 1 day after FM

GW170104 _ same day as PH

FM -17-06-09
GW170608 _ 1 day before FM

GW170608 _ 1 day before FM

GW170729 _ 6 days after NM

GW170809 _ 2 days after FM

PG-17-08-18 _ resulted in 3 LIGO events
GW170814 _ 4 days before PG
GW170817 _ 1 day before PG
GW170818 _ same day as PG

NM-17-08-21 _ solar eclipse
GW170823 _ 2 days after NM

S190408an _  3 days after NM 

S19040412m _ 4 days before PG

MJ-19-04-23_ resulted in 3 LIGO events
S190421 _ 2 days before MJ
S190425z _ 2 days after MJ
S190426c _  3 days after MJ

NM-19-05-04 _ resulted in 2 LIGO events
S190503bf _ 1 day before NM
S190510g _  6 days after NM

FM-19-05-18 _ resulted in 6 LIGO events
S190512at _ 6 days before FM
S190513bm _ 5 days before FM
S190517h _ 1 day before FM
S190519bj _ 1 day after FM
S190521g _ 3 days after FM
S190521r _ 3 days after FM

S190602aq _ 1 day before NM

NM-19-07-02 _ solar eclipse _ resulted in 4 LIGO events
S190630ag _ 2 days before NM
S190701br _ 1 day before NM
S190706ai _ 4 days after NM
S190707q _ 5 days after NM

S190720a _  2 days after FM

S190727h _ 4 days before NM
S190728q _ 3 days before NM

S190814bv _ 1 day before FM

NM-19-08-30 _ resulted in 3 events
S190828j _ 2 days before NM
S190828l _ 2 days before NM
S190901ap   _ 2 days after NM

FM-19-09-13 _ resulted in 3 events
S190910d _3 days before FM
S190910h _ 3 days before FM
S190915ak _ 2 days after FM

NM-19-09-28 -- resulted in 4 events
S190923y _ 5 days before NM
S190924h _ 4 days before NM
S190930s _ 2 days after NM
S190930t _ 2 days after NM

On 2019-04-23 was an alignment separation of the Moon and Jupiter of only 1 degree, 38 minutes, at the same RA.

The frequent correlations between celestial events and the LIGO  events are a surprising coincidence.

A new moon causes a significant earth tide with the Sun also aligned. A full moon is probably less. A perigee has an earth tide regardless of the Sun.

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 for the crust to relax. I was surprised by its meter-level amplitude for a half day.

This observation of a rough correlation could be a random coincidence of dates. The correlation spans all LIGO events.

I really can't argue if someone says you can always find some possible pattern between sets of numbers.
In any case, this observation is interesting.
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 and Sun are known to disturb Earth's crust and oceans, called an earth tide. These earth tides would be a significant disturbance, probably more than a gravitational wave; their effect probably spans more than a day.

All LIGO events were within 6 days of an earth tide event; more than half were within 2 days.

I honestly don't know for certain whether this is an appropriate criteria. I leave it to the reader to decide whether this coincidence is significant.

If this observation is valid: LIGO is finding the earth tide's crust disturbance in its template pattern matching software. An earth tide certainly affects more than just the day of its peak. Apparently the ripple in the crust detected by the LIGO system (which was designed to detect a tiny crust disturbance) was interpreted as a gravitational wave.

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Last updated (10/01/2019)
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