Q. Rov, if there is a partial lunar eclipse (tonight Sep. 17, in Toronto) does one make a brocho?
A. On question 1418 regarding if one recites a brocho (ose mase bereshis) when watching the solar eclipse. We wrote:
“We do not find in Talmud or Shulchan Aruch that our sages instituted any blessing for eclipses;although a bracha is recited on other constant niflaos and wonders of Hashem’s Creation such as thunder, lightning, meteors and comets and according to many Poskim even earthquakes.
Contemporary Poskim maintain that we do not recite a brocho on eclipses. (Orchois Rabbenu (1 p. 95) and Shaarei Brocho (21: n. 73- Shaar Hoayin 7: 6 n. 13, mentions that Shevet Halevy was in doubt).
Horav Shlomo Miller”s Shlit”a opinion is similar.”
The accepted common tradition is not to recite a brocho in such a case. (see also 3703 and 4434 question regarding the moon).
Rabbi A. Bartfeld as revised by, Horav Yaakov Hirschman, Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit'a