Flares also occur on other stars, where the term stellar flare applies. They can also flare up unexpectedly and ignite nearby flammable material. Camera artifacts such as lens flare and glare are not rendered. It was an extraordinarily intense "white light flare". His temper can flare at the slightest pretext. They mostly occur during a severe disease flare. However, tempers would again flare two years later, once more in Argentina. The E3 component has similarities to a geomagnetic storm caused by a solar flare. Tree trunks flare outward at their base. Many trees flare outward at their base. Behind it is a control sphere capable of stopping the solar flare. It is characterised by periods of improvement followed by episodes when symptoms flare up. There are a few exceptions, such as a solar magnetic flare. Oral corticosteroids should not be used, for they can severely flare psoriasis upon their discontinuation. Controversies occasionally flare up in matches between the two nations.