Last time attention of the world public community is attracted to condition of «the hot point» of the biosphere — the Yellowstone supervolcano. We may expect intensification of volcano activity basing on system analysis of modern state of the biosphere, because loss of stability in the first half of the XX century is reflected on all its elements. Measurements of ground deformation in the Yellowstone caldera show that from 1923 to 2003 average rate of uplift and subsidence was 1 — 2 cm/yr, from 2004 to 2006 rate of uplift has increased to 7 cm/yr and rate of subsidence has increased to — 3.5 cm/yr, from 2007 to 2009 vertical motion has decreased to 2 cm/yr up and — 1 cm/yr down [Chang et al., 2010]. Intensification of ground deformation was reflected in growth of seismic activity: in December 2008 and January 2010 the Yellowstone caldera experienced large earthquake swarms. After some decrease of deformation oscillations (to 2013 small subsidence took place in limits of 5 cm) in 2014 new growth of activity was began, for example the maximum total uplift of ~ 25 cm at station WLWY (White Lake, Wyoming) may will be quickly beat and exceed, this threatens by new more powerful earthquakes and may be eruption of volcano! (www.uusatrg.utah.edu/TS_YSRP/wlwy.html) Basing on our estimations of modern state of the biosphere, which may compare with that of ill man with temperature of 39.3 ºC, when condition sharply deteriorates, eruption of supervolcano may leads to destruction of technosphere and decrease of an antropogenic load on the biosphere!
Chang, W.-L., R. B. Smith, J. Farrell, and C. M. Puskas. An extraordinary episode of Yellowstone caldera uplift, 2004 — 2010, from GPS and InSAR observations//Geophys. Res. Lett. — 2010. — Vol. 37. — L 23302. (doi:10.1029/2010GL045451)