diff --git a/swash/processing/wavelet.py b/swash/processing/wavelet.py
index d4fe66b..5ac907a 100644
--- a/swash/processing/wavelet.py
+++ b/swash/processing/wavelet.py
@@ -4,6 +4,7 @@ import logging
 import pathlib
 
 import matplotlib.pyplot as plt
+from matplotlib.ticker import MultipleLocator, LogLocator, NullFormatter
 import numpy as np
 import scipy.signal as sgl
 
@@ -49,12 +50,13 @@ J = 1 / dj * np.log2(N * dt / s0)
 j = np.arange(0, J)
 sj = s0 * 2 ** (j * dj)
 Mw = sj / dt
-sig = np.var(watl[:, i0])
+sig = np.std(watl[:, i0])
 M = np.stack([(np.abs(sgl.cwt(watl[:, i], sgl.morlet2, Mw))/sig)**2 for i in i0])
 v = np.max(M)
+T = 2 * sj * np.pi / 5
 
 for ax_x, M_, x_ in zip(ax.reshape(-1), M, x[i0]):
-    c = ax_x.contourf(t, sj, M_, cmap="Greys", vmin=0, levels=[1, 2.5, 5, 10, 20, 40], extend="both")
+    c = ax_x.contourf(t, T, M_, cmap="Greys", vmin=0, levels=[1, 2.5, 5, 10, 20, 40], extend="both")
     fig_x.colorbar(c, ax=ax_x, label="NWPS")
     ax_x.grid(color="k", alpha=0.2)
     ax_x.text(
@@ -71,6 +73,10 @@ for ax_x, M_, x_ in zip(ax.reshape(-1), M, x[i0]):
     ax_x.set_rasterization_zorder(1.5)
     ax_x.set(ylabel="T (s)", ylim=(sj[0], sj[-1]))
 
+    ax_x.xaxis.set_minor_locator(MultipleLocator(100))
+    ax_x.yaxis.set_major_locator(LogLocator(10, numticks=2**10))
+    ax_x.yaxis.set_minor_locator(LogLocator(10, subs=np.arange(10), numticks=2**10))
+    ax_x.yaxis.set_minor_formatter(NullFormatter())
     if ax_x != ax.reshape(-1)[-1]:
         ax_x.axes.set_xticklabels([])
     else:
diff --git a/swash/processing/zero_cross.py b/swash/processing/zero_cross.py
index 2a4e45c..6469641 100644
--- a/swash/processing/zero_cross.py
+++ b/swash/processing/zero_cross.py
@@ -76,7 +76,7 @@ ax.grid()
 fig.savefig(out.joinpath("wsize.pdf"))
 
 fig2, ax2 = plt.subplots(
-    figsize=(10 / 2.54, 2 / 3 * 10 / 2.54), constrained_layout=True
+    figsize=(10 / 2.54, 4 / 2.54), constrained_layout=True
 )
 ax2.plot(
     t[cr0[i0 - 5] : cr0[i0 + 7]] * 1e-3,