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Post ShakeAlert Message Summaries


Post ShakeAlert Message Summaries provide information about earthquakes detected by the ShakeAlert Earthquake Early Warning System and ShakeAlert’s performance during these events. They summarize how accurately the ShakeAlert System estimated the earthquake’s location and magnitude, how many seismic stations contributed data to these estimates, and how much warning time nearby cities may have received. These summaries are automatically generated for all USGS-issued ShakeAlert Messages with an estimated peak magnitude (M) of 3.5 or larger. Only at M 4.0 or larger are ShakeAlert Messages human-reviewed and forwarded to the National Earthquake Information Center to be posted at www.earthquake.usgs.gov. Summaries for earthquakes less than M 4.0 provide our scientists with more frequent tests of software readiness, but their results are generally not reviewed for quality or accuracy.

Please Note: USGS does not warrant that this information resource will be available without interruption, be error-free, or that any errors must be corrected. Post ShakeAlert Message Summaries are provided “AS IS” and without any warranty, express, implied, or otherwise, regarding its accuracy or performance. Any reliance upon this resource is at the express and sole risk of the user, including its employees, assigns, and insurers.

FileDate PostedSize
1227_2019-07-06_075603_18_miles_E_of_Ridgecrest_3_68.pdf
July 06, 2019 269.93 KB
1226_2019-07-06_075428_30_miles_N_of_Ridgecrest_2_16.pdf
July 06, 2019 276.18 KB
1152_2019-07-05_170220_16_miles_NE_of_Ridgecrest_1_04.pdf
July 06, 2019 266.64 KB
1150_2019-07-05_125504_17_miles_NE_of_Ridgecrest_3_68.pdf
July 06, 2019 277.10 KB
1149_2019-07-05_123830_18_miles_NE_of_Ridgecrest_4_08.pdf
July 06, 2019 276.62 KB
1148_2019-07-05_110753_17_miles_NE_of_Ridgecrest_4_95.pdf
July 06, 2019 281.31 KB
1153_2019-07-05_175956_19_miles_N_of_Ridgecrest_3_42.pdf
July 05, 2019 284.76 KB
1151_2019-07-05_143933_16_miles_NE_of_Ridgecrest_3_72.pdf
July 05, 2019 277.94 KB
1147_2019-07-05_105938_7_miles_E_of_Ridgecrest_3_57.pdf
July 05, 2019 281.87 KB
1146_2019-07-05_085402_17_miles_NE_of_Ridgecrest_3_55.pdf
July 05, 2019 269.82 KB
1145_2019-07-05_082104_6_miles_E_of_Ridgecrest_3_46.pdf
July 05, 2019 281.76 KB
1144_2019-07-05_073913_18_miles_E_of_Ridgecrest_3_46.pdf
July 05, 2019 269.29 KB
1142_2019-07-05_060923_8_miles_E_of_Ridgecrest_3_71.pdf
July 05, 2019 278.02 KB
1141_2019-07-05_041138_15_miles_NE_of_Ridgecrest_3_52.pdf
July 05, 2019 276.44 KB
1140_2019-07-05_020159_11_miles_E_of_Ridgecrest_3_88.pdf
July 05, 2019 275.33 KB
1139_2019-07-05_004539_16_miles_NE_of_Ridgecrest_3_95.pdf
July 05, 2019 270.94 KB
1138_2019-07-05_003206_19_miles_NE_of_Ridgecrest_3_89.pdf
July 05, 2019 269.90 KB
1137_2019-07-05_001748_12_miles_E_of_Ridgecrest_1_61.pdf
July 05, 2019 267.63 KB
1136_2019-07-04_234233_16_miles_NE_of_Ridgecrest_3_55.pdf
July 04, 2019 277.12 KB
1135_2019-07-04_233400_13_miles_E_of_Ridgecrest_3_91.pdf
July 04, 2019 274.71 KB
1134_2019-07-04_231240_18_miles_E_of_Ridgecrest_3_49.pdf
July 04, 2019 270.56 KB
1131_2019-07-04_214033_14_miles_E_of_Ridgecrest_3_42.pdf
July 04, 2019 273.70 KB
1130_2019-07-04_201450_16_miles_NE_of_Ridgecrest_3_98.pdf
July 04, 2019 273.49 KB
1115_2019-07-03_030405_17_miles_E_of_Cloverdale_3_4.pdf
July 03, 2019 306.69 KB
1096_2019-06-23_035302_29_miles_SW_of_Rio_Dell_5_53.pdf
June 23, 2019 205.16 KB
1090_2019-06-06_225246_2_miles_E_of_La_Habra_5_3839.pdf
June 18, 2019 289.88 KB
1091_2019-06-10_024111_16_miles_E_of_Bakersfield_3_53.pdf
June 18, 2019 318.66 KB
1092_2019-06-11_074625_16_miles_E_of_Cloverdale_3_72.pdf
June 18, 2019 304.41 KB
1093_2019-06-11_205838_15_miles_NW_of_Tracy_3_1.pdf
June 18, 2019 373.57 KB
1094_2019-06-13_000733_15_miles_S_of_Camarillo_3_63.pdf
June 18, 2019 284.60 KB