Possible Clues:

• One getting letters of distress to stay away interests the geologist, whose crust is in the balance
• Is having nothing to do with lead scientist in lodge describing land movement - that's all about balance!
• One getting distress signal to stay away interests the geologist, whose crust is in the balance
• State of equilibrium between the earth’s crust and mantle
• The gravitational equilibrium by which the earth’s crust “floats” over its mantle
• I call for help and stay working for balanced state
• Single call for help to stay relaxed is a concern for the geologists looking for a crust
• Otis says modification is to do with equilibrium in Earth's crust
• I+SOS+2+C announced equilibrium in Earth¿s crust