Figure 8: Education¶

This notebook is part of the supplementary materials for the Syngine paper and reproduces figure 8.

This notebook creates the phase relative times figure. Requires matplotlib >= 1.5 and an ObsPy version (>= 1.0) with the syngine client.

Authors:¶

Lion Krischer (@krischer)

%matplotlib inline

import obspy
import numpy as np

from obspy.clients.syngine import Client

import itertools

import matplotlib.pyplot as plt
from mpl_toolkits.basemap import Basemap
plt.style.use("seaborn-paper")

c = Client()

# Get seismograms for various strike values.
_d_plane_crossing = []

for strike in np.linspace(85, 95, 11):
    print(strike)
    _d_plane_crossing.append((strike, c.get_waveforms(model="ak135f_5s",
        receiverlatitude=0.0, receiverlongitude=0.0,
        sourcelatitude=0.0, sourcelongitude=30.0, components="Z", units="velocity",
        sourcedepthinmeters=0.0, sourcedoublecouple=[strike, 90.0, 0.0])[0]))

85.0
86.0
87.0
88.0
89.0
90.0
91.0
92.0
93.0
94.0
95.0

max_amp = max(np.abs(_i[1].data).max() for _i in _d_plane_crossing)

for _i, tr in enumerate(_d_plane_crossing):
    plt.plot(tr[1].data / max_amp + _i)
plt.xlim(1300, 2100)
plt.show()

_d_depth = []

# Get seismograms for various depths.
for depth in [10, 20, 30, 40, 50, 100, 200]:
    print(depth)
    _d_depth.append((depth, c.get_waveforms(model="ak135f_5s",
        receiverlatitude=0.0, receiverlongitude=0.0,
        sourcelatitude=0.0, sourcelongitude=30.0, components="Z", units="velocity",
        sourcedepthinmeters=depth * 1000, sourcemomenttensor=[1E20, 0, 0, 0, 0, 0])[0]))

10
20
30
40
50
100
200

max_amp = max(np.abs(_i[1].data).max() for _i in _d_depth)

for _i, tr in enumerate(_d_depth):
    plt.plot(tr[1].data / max_amp + _i * 0.5)
plt.xlim(0, 6000)
plt.show()

# Plot everything.
plt.figure(figsize=(8, 3))

plt.subplot(121)

max_amp = max(np.abs(_i[1].data).max() for _i in _d_plane_crossing)

ticks = []
labels = []

for _i, tr in enumerate(_d_plane_crossing):
    plt.plot(tr[1].times(), tr[1].data / max_amp * 200.4 + _i, color="0.1")
    ticks.append(_i)
    labels.append("%i" % (90.0 - tr[0]))
plt.xlim(345, 460)
plt.text(360, 10.8, "P Phase", size="small")
plt.text(403, 10.8, "PP Phase", size="small")
plt.ylim(-2, 12)
plt.xlabel("Time since origin [s]")
plt.ylabel("$\Delta_{strike}$ from nodal plane [degree]")
plt.yticks(ticks, labels)

plt.subplot(122)
max_amp = max(np.abs(_i[1].data).max() for _i in _d_depth)

colors = ["0.7", "0.1", "0.4", "0.1", "0.1", "0.1", "0.1"]

ticks = []
labels = []
for _i, tr in enumerate(_d_depth):
    plt.plot(tr[1].times(), tr[1].data / max_amp * 14.0 + _i, color=colors[_i])
    ticks.append(_i)
    labels.append("%i" % (tr[0]))
plt.xlim(0, 1500)
plt.gca().yaxis.tick_right()
plt.xlabel("Time since origin [s]")
plt.gca().yaxis.set_label_position("right")
plt.ylabel("Event depth [km]")
plt.yticks(ticks, labels)
plt.tight_layout()
plt.ylim(-1, 7)
plt.savefig("education.pdf")
plt.show()