The phrase "actually simultaneously" is correct and usable in written English.
It can be used to emphasize that two or more actions or events are occurring at the same time, often in a context where this might be surprising or noteworthy.
Example: "The two experiments were conducted actually simultaneously, which allowed for a direct comparison of the results."
Alternatives: "truly at the same time" or "genuinely concurrently".
A new MIT study of the neural circuits that underlie this process reveals, for the first time, that memories are actually formed simultaneously in the hippocampus and the long-term storage location in the brain's cortex.
This segment is particularly interesting because it frequently depicts simultaneous interactions, sometimes by using a split screen to show multiple participants in the same meeting, and sometimes by sequentially showing meetings of sub-groups of participants that actually occurred simultaneously.
One hundred ninety-one people died -- a horrific toll but nowhere near what it could have been had all of the bombs actually detonated, simultaneously, and in the station itself.
On van Cleve's reading, it is required that for any intuition that I have, I actually become simultaneously conscious of its elements.
The noise sources and are included to model the impact of the receiver clock on the individual delays and delay rates, since they are actually affected simultaneously by the same random process.
Some nights Suicide and the Dolls were actually playing simultaneously at the Mercer Arts Center.
I'm not talking about sharing notes with your buddy who was too hungover to make it to class, I'm talking about actually working simultaneously on the same set of notes during a lecture.
Production of IL-6 and IL-10 actually occurs simultaneously with upregulation of CD163, and act as intermediates in boosting CD163 expression [ 54].
This is probably because target mRNAs are actually affected simultaneously by multiple miRNAs [ 25, 26] synergistically or possibly several miRNAs-regulated pathways are involved in the progression of the disease [ 27].
Ordinary bifurcation diagrams show the number of coexisting stable states of which the system may occupy just one at a time, but Figure 7a shows the number of stable Notch levels actually expressed simultaneously over the lattice for each value of θD.
The slowdown has actually helped them, simultaneously producing seemingly endless supplies of unsold inventory and forcing consumers to tighten their belts.
