Convert centihertz [cHz] to attohertz [aHz] Online | Free frequency-wavelength Converter

The Unit for Slow Oscillations

The centihertz (cHz) is a unit of frequency equal to 10⁻² hertz, meaning one cycle occurs every 100 seconds, or approximately 1 minute and 40 seconds. This frequency range is useful in studying slow, periodic phenomena in fields like geophysics, astrophysics, and engineering.

In geophysics, centihertz frequencies often describe slow seismic waves and Earth’s natural resonances after earthquakes. These oscillations provide insights into the planet’s interior structure and the behavior of seismic waves as they travel through different layers. Monitoring these frequencies helps improve earthquake understanding and early-warning systems.

In astrophysics, centihertz frequencies correspond to certain pulsations in stars and compact objects like neutron stars. These slow oscillations help scientists probe the physical properties, rotation, and magnetic fields of such objects.

In engineering, centihertz vibrations may be important for studying the stability and resonance of large structures like bridges or skyscrapers, which can oscillate slowly under environmental forces like wind or traffic.

Centihertz frequencies represent a middle ground between very slow ultra-low frequencies and faster oscillations. By understanding these frequencies, researchers can better analyze processes that unfold over minutes, bridging time scales relevant to both natural phenomena and engineered systems.

Measuring Ultra-Low Frequencies

The attohertz (aHz) is an extremely small unit of frequency equal to 10⁻¹⁸ hertz, or one cycle per 10¹⁸ seconds (about 31.7 billion years). This unit is used to describe ultra-low frequency phenomena that occur on cosmic or geological timescales, far beyond everyday human experience.

Attohertz frequencies are relevant in cosmology, astrophysics, and geophysics, where they help scientists study processes that evolve over billions of years. For example, gravitational waves generated by massive cosmic events or the oscillations of the Earth’s magnetic field can be characterized by frequencies in the attohertz range. These waves have enormous wavelengths, often spanning millions or billions of kilometres.

Because the attohertz corresponds to such a long period between cycles, it is mostly used in theoretical research rather than practical applications. Understanding phenomena at this scale gives insight into the fundamental workings of the universe, including the slow evolution of cosmic structures, the expansion of space-time, and the early conditions following the Big Bang.