The phrase 'increasing magnitude' is grammatically correct and is usable in written English.
You can use it to describe a situation that has become more intense, serious, or noteworthy in some way. For example, "The consequences of the earthquake were of an increasing magnitude, causing even more destruction as time went on."
The enhancement of the PL intensity with an increasing magnitude of magnetic field is attributed to the increased availability of valence band holes on the silicon surface.
But the increasing magnitude becomes small and tends to be a certain value.
Infectious diseases and antibiotic resistance have become a public health issue of increasing magnitude.
In all four case study sites, maximum current speeds increase with increasing magnitude of the earthquake source, increasing mean wave period or increasing scenario wave heights.
In contrast, the bias for the pulmonary artery diastolic pressure estimate significantly increased with the increasing magnitude of the pulmonary artery occlusion pressure.
With only some exceptions, the judgements of the seat comfort decreased significantly with increasing magnitude, locked suspension and time.
The transition of individual characters like feather shape, or wrist flexion can, and have been, analysed and found to show a clear and simple progression of increasing magnitude and/or complexity over time.
Some families give eight gifts of increasing magnitude for Hanukkah (which we celebrate with a family activity or game every night).
Annoyance increased with an increase in the number of passing trains and with increasing magnitude of vibration.
The resonance frequency of the second mode of vibration, but not the first, decreased with increasing magnitude of vibration.
Both the vertical GPS and the InSAR velocity fields show an uplift signal of increasing magnitude towards the north-east of the scene (Fig. 2), likely due to ice unloading of Vatnajökull glacier.
