"spontaneously arising" is correct and usable in written English.
You can use it when referring to something happening naturally and without warning. For example, "The idea for the project spontaneously arose during the team meeting."
P.H.: Yes, coalitions are spontaneously arising all over the world.
Spontaneously arising (de novo) mutations have an important role in medical genetics.
This report describes a spontaneously arising rhabdomyosarcoma of soft tissues in a brook trout (Salvelinus fontinalis).
The observations in this experimental model must now be confirmed in animals with spontaneously arising AA amyloidosis.
Spontaneously arising iron storage diseases in non-murine species also overlap in some clinicopathological aspects with human haemochromatosis.
The dramatic differences in the rejections can be explained by the spontaneously arising electric fields generated in the membrane phase.
People have simple and direct face-to-face relations with each other that are determined by Wesenwille (natural will)—i.e., natural and spontaneously arising emotions and expressions of sentiment.
My laboratory is focused primarily on studying the mechanisms underlying neurologic disease in animals utilizing both spontaneously arising disease and experimental models in a variety of laboratory animal species.
The solution presented here enables rapid calculations that explore the effects of spontaneously arising electric fields on rejections in nanofiltration (NF), volume flows in pressure-retarded osmosis (PRO) through NF membranes, and NaCl rejections in forward osmosis (FO).
Therefore, experimentally induced or spontaneously arising veterinary tumors may represent a promising option [63, 66, 67].
At present, the first-line drugs (oseltamivir and zanamivir) don't seem to be optimistic due to the spontaneously arising and spreading of oseltamivir resistance among influenza virus.
