The period of Grahan will have some negative effects on few people. It depends on the alignment of the stars according to the Kundali. As a general rule, you should follow some precautions during Grahana. This is true for both Surya Grahana as well as Chandra Grahana.
On this October 23rd 2014, we have a Surya Grahan occuring during the after as per Indian Standard Time. But, this grahan is not visible in India and the effects will be very less. If you are a pregnant woman or have patients at your home, it is better to avoid going out during this period. You can utilize this period to chant mantras and gain positive energy.
Surya Grahana Mantra for 23rd October 2014 is
Om Adityaya Vidmahe Divakaraya Dheemahi
Tanno Suryah Prachodayat.
Apart from this, you can also chant the Mahamrutyunjaya Mantra and Gayatri Mantra for positive benefits.