Jan 20 (Reuters) - The Baltic Exchange"s dry bulk sea freight index (.BADI) fell for a tenth straight session on Thursday, touching its lowest level in about a year, on waning demand across all vessel segments. * The overall index, which factors in rates for capesize, panamax and supramax vessels, fell 96 points, or 6.1%, to 1,474, its lowest since February 2021. * The capesize index (.BACI) dropped 195 points, or 15.9%, to 1,031, its lowest since Feb. 12 last year. * "Big ships are still suffering from the typical January dip after a very brutal start to the year," shipbroker Fearnleys said in a weekly note, referring to the capesize segment. * Average daily earnings for capesize vessels, which transport 150,000-tonne cargoes such as iron ore and coal, dropped by $1,622 to $8,547. * Meanwhile, iron ore pushed higher on expectations of further monetary easing measures in top steel producer China. * The panamax index (.BPNI) slipped 71 points, or 3.4%, to its lowest since April at 2,024. * Average daily earnings for panamax vessels, which ferry 60,000-70,000 tonne coal or grain cargoes, fell by $632 to $18,220. * The lack of coal exports from Indonesia continued to impact the market in the week to Jan. 20, Fearnleys added. * Indonesia"s government has eased a coal export ban for 139 companies as of Thursday. The world"s biggest thermal coal exporter on Jan. 1 imposed a month-long export ban without warning, causing jitters in markets and among major importers.