Python - Como puedo arreglar mis graficas - IndexError: too many indices for array

H=np.genfromtxt('VIC_HDZ.txt', usecols=2, skip_header=1)

D=np.genfromtxt('VIC_HDZ.txt', usecols=3, skip_header=1)

Z=np.genfromtxt('VIC_HDZ.txt', usecols=4, skip_header=1)

time = np.linspace(0,24,1440)

fig, ax = plt.subplots(3,1,figsize=(12,6))

plt.xlabel('Universal time (Hour)')

#H

ax[0,0].plot(time, H)

ax[0,0].set_ylabel(f'$H (nt)$')

ax[0,0].set_title('Victoria (VIC)')

#D

ax[1,0].plot(time, D)

ax[1,0].set_ylabel(f'$D (deg)$')

#Z

ax[2,0].plot(time, Z)

ax[2,0].set_ylabel(f'$Z (nt)$')

#pero obtengo un error de IndexError: too many indices for array