One more puzzle of the Tunguska catastrophe?

Using the results of the dendrochronological analysis (68 tree-ring chronologies), it has been shown that the increase in the annual growth of trees after the Tunguska bolide explosion on June 30, 1908, is observed at a large distance (more than 1500 km) from the explosion site (61° N, 102° E) and covers a huge area of about 2 × 10⁶ km² (60°–75° N, 80°–110° E). The anomalous growth of the trees was previously reported only for the direct-destruction area (about 2000 km²). A similar result was obtained when analyzing changes in the annual growth at the time of the Chulym bolide explosion on February 26, 1984 (57.7° N, 85.1° E). A possible interpretation of the observed phenomenon is given. The results open new opportunities for using the dendrochronological method to solve the problems of asteroid-comet danger.