This event was automatically detected and need to be confirmed by one of our analysts.
Type Event
Magnitude 5.5 mb
Local datetime 2021/12/20 12:10
Universal datetime 2021/12/20 20:10
Latitude 40.69 ° ± 5 km
Longitude -123.48 ° ± 5 km
Depth 10 km (from location) ± 0.0 km

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See the seismogram of this event.

Near cities

This table shows only the most populated cities around the epicenter.
Name Distance (km) Population
Sacramento  291 467898
Santa Rosa  257 155118
Vallejo  305 120446
Redding  92 91685
Chico  175 70565
Medford  189 69638
Yuba City  234 52432
Grants Pass  195 27191
Eureka  58 25626
Roseburg  281 20430
Klamath Falls  222 19203
Arcata  56 17199
Ukiah  172 15825
Coos Bay  304 15394
Crescent City  133 7345

Past seismicity

  This map shows only the 0 most significant earthquakes around this event.

Event details

Parameters

Evaluation status
RMS 2.37
Azimuthal gap 171.1 °
Number of stations used 35
Number of phases used 35

Webservices

The data of this event are available in various formats (QuakeML, GeoJSON and text) through the following links :

QuakeML GeoJSON Text

Phases

Network Station Phase Time Residual (s) Azimuth (°) Distance (°) Mode
IU COR P 20:11:30.19 1.74 1.79 3.9 Automatic
II PFO P 20:12:34.64 -4.06 139.49 9.01 Automatic
IU TUC P 20:13:36.97 1.17 125.46 13.18 Automatic
IU ANMO P 20:13:57.87 2.58 107.72 14.59 Automatic
IU RSSD P 20:13:57.77 0.5 70.08 14.72 Automatic
II FFC P 20:14:59.67 -1.88 38.22 20 Automatic
IU HKT P 20:15:50.92 -0.31 106.84 24.83 Automatic
IU CCM P 20:15:50.49 -1.75 85.48 24.91 Automatic
II KDAK P 20:15:51.87 -2.84 322.49 25.21 Automatic
IU COLA P 20:16:21.32 2.14 338.02 27.93 Automatic
IU WVT P 20:16:20.22 -0.86 87.66 28.1 Automatic
IU WCI P 20:16:24.57 -0.95 82.65 28.6 Automatic
IU SSPA P 20:17:13.19 -1.52 74.77 34.18 Automatic
IU TEIG P 20:17:33.89 2.32 113.73 36.21 Automatic
IU HRV P 20:17:49.17 -0.41 69.59 38.25 Automatic
II JTS P 20:18:50.62 2.42 120.87 45.56 Automatic
II ALE P 20:18:48.32 -4.64 9.13 46.04 Automatic
IU SFJD P 20:18:54.87 -2.41 30.94 46.57 Automatic
IU PET P 20:19:35.92 -2.6 311.67 51.93 Automatic
IU SJG P 20:19:50.22 -0.93 97.04 53.72 Automatic
IU MA2 P 20:19:55.47 3.11 321.26 53.8 Automatic
IU OTAV P 20:20:15.72 -0.93 122.9 57.41 Automatic
II BORG P 20:20:23.89 -2.59 29.26 58.56 Automatic
IU YSS P 20:20:57.85 -3.88 310.58 63.74 Automatic
IU KEV P 20:21:28.42 2.59 10.64 67.46 Automatic
II NNA P 20:21:29.67 2.52 129.94 68.04 Automatic
II LVZ P 20:21:45.67 2.9 8.57 70.17 Automatic
IU KONO P 20:22:00.57 3.72 22.77 72.49 Automatic
II TLY P 20:22:35.42 1.49 332.42 78.96 Automatic
IU ULN P 20:22:42.72 -1.12 328.36 80.79 Automatic
II BFO P 20:22:47.42 0.76 30.09 81.32 Automatic
IU PAB P 20:22:49.57 -3.25 42.8 82.5 Automatic
II OBN P 20:22:56.47 2.54 11.35 82.7 Automatic
II KIV P 20:23:53.27 2.95 9.95 94.45 Automatic
II AAK P 20:23:54.82 1.5 346.83 95.11 Automatic