"occurred concurrently" is both correct and usable in written English.
It is generally used to describe two or more events that happened at the same time. For example, you could say "The rise of the internet and the fall of the music industry occurred concurrently in the late 1990s."
SO42 − reduction occurred concurrently with cis-DCE and VC dehalogenation.
In the hydroformylation process, both hydroformylation and hydrogenation of ethylene occurred concurrently.
reFSH treatment occurred concurrently with the last week of P&E treatment.
The observed changes occurred concurrently with reduced brain derived neurotrophic factor.
Therefore, elimination of the genes related to certain biological processes of the plastid has occurred concurrently in both the plastid and nuclear genomes.
Enlargement of the range used by wintering birds occurred concurrently, and now the species is common during winter in the southeastern United States.
Direct and indirect photoreactions occurred concurrently in GO samples containing H2O2, and indirect photoreaction accounted for ∼70% of GO conversion to CO2.
Subsequent monetary easing by the Federal Reserve occurred concurrently with the economic recovery, which itself was underway by the time Warren Harding took the oath of office.
Multiple important law enforcement, pharmaceutical, policy, and public health actions occurred concurrently, including implementation of a statewide Prescription Drug Monitoring Program PDMPPrescription Drug Monitoring Program PDMP
The TG-MS equipped with a humidity generator controlling the atmosphere revealed the presence of hydrolysis products occurred concurrently during the thermal decomposition process.
Dryland crops have systematically expanded in the north-east of the catchment, an area where increasing in-stream salinization has occurred concurrently with this transition.
