Published April 27, 2023 | Version 1.0.0
Dataset Open

Dataset corresponding to the publication: Friction and slip measured at the bed of an Antarctic ice stream

  • 1. University of Oxford

Description

The following data is included here, which comprises the data presented in the publication:
Hudson, T. S., Kufner, S., Brisbourne, A. M., Kendall, J., Smith, A. M., Arthern, R., & Alley, R. (2023). Friction and slip measured at the bed of an Antarctic ice stream. Nature Geoscience.

Files included are:
all_icequakes_2018to2019.csv - A catalogue of the icequakes used in the study.
cluster_????.csv - csv files containing the results for each icequake, grouped by cluster (i.e. one csv file per cluster).
slip_rate_movie.mp4 - A movie of slip-rate for each icequake through time.

Headers for the files are as follows:
------------------------------------- all_icequakes_2018to2019.csv file -------------------------------------
origin_time - Origin time of icequake, in UTC time.
Mw - Moment magnitude.
Mw_err - Error in Mw.
fc - Corner frequency (Hz).
fc_err - Error in corner frequency.
Q - Quality factor (measure of attenuation).
Q_err - Error in Q.
inter-event_time_s - Inter-event time between this icequake and the previous icequake (s).
stress_drop - Stress-drop of icequake (Pa).
stress_drop_err - error in stress-drop.
lat - Latitude (decimal degrees).
lon - Longitude (decimal degrees).
x (km) - x grid location (km).
y (km) - y grid location (km).
z (km bsl) - Depth (km bsl).
x_err (km) - Error in x (km).
y_err (km) - Error in y (km).
z_err (km) - Error in z (km).

------------------------------------- cluster_XXXX.csv file -------------------------------------
mean_Mw - Mean moment magnitude for icequake from all receivers.
mean_fc - Corner frequency for icequake from all receivers (Hz).
stdev_Mw - Standard deviation in Mw.
stdev_fc - Standard deviation in corner-frequency.
mean_Q - Mean Q for icequake from all receivers.
stdev_Q - Standard deviation in Q.
n_obs - Number of receivers used to calculate above means.
lat - Latitude of icequake.
lons - Longitude of icequake.
depths - Depth of icequake (km bsl).
x - x location of icequake (km).
y - y location of icequake (km).
zs - z location of icequake (km bsl).
origin_time - Origin time of icequake (UTC time).
origin_time_days - Origin time in days relative to 1st January 2019 (days).
inter-event_time_s - Inter-event time from previous to current event (s).
stress_drop - Stress drop (Pa)
uncertainty_stress_drop - Uncertainty in stress-drop.
M_0 - Seismic moment release (Nm).
uncertainty_M_0 - Uncertainty in M_0.
fault_radius_m - Fault radius, in metres.
uncertainty_fault_radius_m - Uncertainty in fault radius (m).
slip_ice_m - Slip in the ice (m).
slip_till_m - Slip in the till (m).
uncertainty_slip_ice_m - Uncertainty in slip_ice_m.
uncertainty_slip_till_m - Uncertainty in slip_till_m.
RSF_v/v_0 - v/v_0 calculated for the rate-and-state model.
RSF_sigma - Normal stress calculated for the rate-and-state model (Pa).
RSF_tau - Shear-stress calculated for the rate-and-state model (Pa).
uncertainty_RSF_v/v_0 - Uncertainty in RSF_v/v_0.
uncertainty_RSF_sigma - Uncertainty in RSF_sigma.
uncertainty_RSF_tau - Uncertainty in RSF_tau.
RSF_G* - Effective shear-modulus calculated for the rate-and-state model (Pa).
RSF_Gb - Bed shear modulus calculated for the rate-and-state model (Pa).
RSF_slip_m - Slip calculated for the rate-and-state model (Pa).
uncertainty_RSF_G* - Uncertainty in RSF_G*.
uncertainty_RSF_Gb - Uncertainty in RSF_Gb.
uncertainty_RSF_slip_m - Uncertainty in RSF_slip_m.

Files

all_icequakes_2018to2019.csv

Files (39.5 MB)

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