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We present the multiwavelength flaring activity of the blazar AO 0235+164during its recent active period from 2013 to 2019. From a discrete correlationfunction (DCF) analysis, we find a significant (>95%) correlation between radioand $\gamma$-ray light curves with flares at longer wavelengths followingflares at shorter wavelengths. We identify a new jet component in 43 GHz VLBAdata that was ejected from the radio core on MJD $57246^{+26}_{-30}$ (2015August 12), during the peak of the 2015 radio flare. From the analysis of thejet component, we derived a Doppler factor of $\delta_{\rm var}=28.5\pm8.4$, abulk Lorentz factor of $\Gamma=16.8^{+3.6}_{-3.1}$, and an intrinsic viewingangle of $\theta_{\rm v}=1.42^{+1.07}_{-0.52}\textrm{ degrees}$. Investigationof the quasi-simultaneous radio data revealed a partially absorbed spectrumwith the turnover frequency varying in the range of $10-70$ GHz and the peakflux density varying in the range of $0.7-4$ Jy. We find the synchrotronself-absorption magnetic field strength to be $B_{\rmSSA}=15.3^{+12.6}_{-14.0}$ mG at the peak of the 2015 radio flare, which iscomparable to the equipartition magnetic field strength of $B_{\rmEQ}=43.6^{+10.6}_{-10.4}$ mG calculated for the same epoch. Additional analysisof the radio emission region in the relativistic jet of AO 0235+164 suggeststhat it did not significantly deviate from equipartition during its recentflaring activity.

A Near Magnetic-to-kinetic Energy Equipartition Flare from the Relativistic Jet in AO 0235+164 during 2013-2019