The official U.S. forecast and alert authority for space weather. Heliosinger pulls the planetary K-index, X-ray, proton, and electron flux from swpc.noaa.gov. K-index drives the rhythmic and geomagnetic-storm components of the audio.
NOAA's geostationary fleet measures real-time X-ray flux (solar flares), proton flux (radiation storms), and electron flux (energetic-particle events). These drive the brightness bursts and high-frequency shimmer in the audio. Source: SWPC GOES products.
NOAA / NASA's L1 sentinel — measures solar wind speed, density, temperature, and the interplanetary magnetic field (Bx, By, Bz, Bt) about 1 hour upstream of Earth. DSCOVR is the foundation layer of the audio: pitch, harmonics, and stereo field. Mission: SWPC Real-Time Solar Wind.
Ground-based magnetometer at Boulder, Colorado measures local geomagnetic field components (H, D, Z) at 1-minute cadence. Drives slow pulses and low-frequency thuds when the geomagnetic field disturbs. Source: SWPC Boulder Magnetometer.
NOAA data is U.S. government work and is in the public domain. We attribute it because attribution is good practice and because the people running these instruments deserve credit for keeping them online.
Heliosinger is built on Web Audio API (browser) / AVAudioEngine (iOS), React, Vite, Tailwind, Cloudflare Pages, Cloudflare Workers, SwiftUI, and a handful of MIT-licensed libraries. Full dependency list lives in package.json and the Swift Package Manager manifest in the iOS project.
App design and sonification mappings: Hunter Bown / Shannon Labs.
Spotted a missing credit? [email protected].