The only station which was sub-solar at the time of this CME was the Texas
station.
There have been hints about this in the literature over the years. But papers
which cross-pollinate data from space/meteorology/geologic physics are rare
Here are a few you might look at though. Sorry for the age of these, it has
been several years since I did a literature review in this subject. There may
be a lot more since then.

By the way, my purpose here is not to convince you or anyone else of anything,
but merely to suggest possibilities. I am glad to see you are taking this possibility
seriously as you have demonstrated an open mindedness which speaks well
of your training. The only way to convince yourself (really) is to watch the seismograms
when strong sudden commencement storms occur and see if a pattern develops.
It is easy to suggest a pattern, but I am not in a position to publish or "prove"
anything, that needs to be done by academics. I hope, however, that these observations
is a starting place for someone to look more seriously into the matter now that
data for examining this is readily available on the web.
I have indicated references which directly address this question by -->
There are some more recent that I have not yet found the references
for, and will post as soon as I locate them.

Boshi, E. Dragoni, M., 1985, Fractures due to free oscillations of the earth,
Nuovo Cimento, B 8 (3), p 301.

Danja, A. 1960, Variations in the rotation of the earth associated with the solar flares
of Feb. 23, 1956 and July 1-14-16, 1959, July 1959 Events Symposion, Helsinki, 1960

Djurovic, D., 1983, Short period geomagnetic atmospheric and earth rotation variations,
Asron. Astrophys. V 118, p 26-28.

Hu, Xin-Kang, Shi, Jin-Rui, Ren, Jian-Guo, 1980, Preliminary study of the relation
between a kind of pressure wave in teh atmosphere and earthquakes. Acta Geophys.
Sinca V 23 (4), p 451-458.

Huang, Jinzhong, 1986, A law of plate tectonics periodic jump in motion controlled
by the Earth's internal and external dynamic systems. Recent developments in world
seismology. Aug 1986, 87, p 16-17.

Jakubcova, I, Pick, M, 1987, Correlation between solar motion, earthquakes and other
geophysical phenomena. Ann. Geophys. Ser. B, v5, no 2, p 135-142, Apr. 1987.

Jiangui, Gao, 1981, On earthquakes triggered by changes of angular velocity
of the earth's rotation, Kexus Tonbao, V 26, p 719-724.

-->
Larinov, V.A. 1983. The connection between geomagnetic field changes and the earth's
surfae deformation Izd. Nauk (English abstract p 142-143).

O'Hara NPJ, Penny, CJA, 1973, Rotation of the earth during the 1972 solar event,
Nature, v 244, p 426-427.

Simpson, J.C. 1967. Solar Activity as a triggering mechanism for earthquakes.
Earth and planetary Science letters, 4, p 417-425.

Sobakar, G.T., Deinko, V.I., 1978, Space-time correlations between gravity,
quasi-periodic variations, solar activity, earthquake energy and Earth's
crustal structure, Geofizica, 9b, No 82, p 3-8.

Srrels, G.G., McDonald, J.A. Herrin, E, 1971, Earth motion caused by
local atmosphere pressure drup. Geophys. J. Vol 26, p 83-90.

Sytimski, A.D. 1979, On a solar-atmosphere effect during strong earthquakes.
Dokl. Akad Nauk, SSR v 245, p 1337-1340.

-->
Tscherning, O.C. Goed, C.C., 1983, Correlation between time dependent
variations of doppler determined height and sunspot number, J. Geophys. Res.
V 90 B6 4589-4596

Davidov, A.V. and G.I. Dolgikh, 1997. Modulation of the Free Oscillations of the
Earth. Izvestiya, Phys. Solid Earth 33 (8), 46-49.

Kobayashi, Tanimoto, Suda, Nwa and Kaker, 1998, Continuous Excitation of the
Normal Modes, Nature.

Mozzarella A. and A. Palumbo, 1989, Does the solar cycle modulate seismic and
Volcanic activity? Journ. Volcano. and Geotherm. Res, V 39, 89-93

Sobolev, G.A., I.P Shestapolov and E.P. Karin, 1998, Implications of solar flares
for the seismic Activity on the Earth, Izvestiya, Phys. Solid Earth, 34(7), 603-607

Druzhinin, I.P & N.V. Khamyova, 1973, Solar activity and sudden changes in the
natural processes on earth, Translated from Russian, published by NASA, 1973
#TT F-652