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We report on bursts from the Soft Gamma-Ray Repeater SGR 1806--20 detectedwith INTEGRAL in October 2003, during a period of moderate activity of thesource. The spectral and temporal properties of 21 short bursts are consistentwith those found in previous observations, even if these bursts are among thefaintest observed in the 15-200 keV range from this source. During some of thebursts a clear spectral evolution is visible. The data also show, for the firsttime, evidence for a hardness-intensity anti-correlation within SGR 1806--20bursts.Comment: Accepted for publication in Astronomy & Astrophysics Letter

Spectral evolution of weak bursts from SGR 1806–20 observed with INTEGRAL