import type { Coordinates, SourceResult, VolcanicData } from '../types/index.js';
/**
 * USGS Volcano Hazards Program — elevated volcano alerts.
 * Returns all volcanoes at ADVISORY (yellow), WATCH (orange), or WARNING (red).
 * No API key required.
 */
export declare function fetchSmithsonianGvp(coords: Coordinates): Promise<SourceResult<VolcanicData>>;