Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 19-08-2020 and time 15:49:48 (UTC) in region 6 km NW Ussita (MC)

A magnitude ML 1.2 earthquake occured in region: 6 km NW Ussita (MC), on

  • 19-08-2020 15:49:48 (UTC)
  • 19-08-2020 17:49:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9900, 13.1100 at 12 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Ussita MC 6 444 444
Fiordimonte MC 6 202 646
Fiastra MC 7 559 1205
Visso MC 7 1107 2312
Acquacanina MC 7 121 2433
Pieve Torina MC 8 1458 3891
Pievebovigliana MC 8 866 4757
Monte Cavallo MC 9 145 4902
Bolognola MC 10 142 5044
Castelsantangelo sul Nera MC 11 281 5325
Muccia MC 12 915 6240
Preci PG 14 724 6964
Serravalle di Chienti MC 16 1070 8034
Sarnano MC 17 3264 11298
Camerino MC 17 6974 18272
Cessapalombo MC 18 512 18784
Sellano PG 19 1079 19863
Caldarola MC 19 1823 21686
Montefortino FM 20 1178 22864

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
60 Km E of Perugia (166134 inhabitants)
61 Km NE of Terni (111501 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
100 Km NW of Montesilvano (53738 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.2 2020-08-19
15:49:48		 42.9898 13.1098 12 2020-11-19
12:37:00		 Bollettino Sismico Italiano INGV 82786311
Reviewed
Rev100 		ML 1.2 2020-08-19
15:49:48		 42.9885 13.1113 11 2020-08-19
15:56:59		 Sala Sismica INGV-Roma 82148361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-19 15:49:48 ± 0.04
Latitude 42.9898 ± 0.0027
Longitude 13.1098 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82786311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 259
Semi-minor axis of confidence ellipse (meter) 56
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.51531
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 82786311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-10 09:30:35

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 82148361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-19 15:56:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2020-08-19T15:50:03.34 0.3 undecidable manual S 300 43.8228 92 0.37 65
IV.ASSB.HHZ. 2020-08-19T15:50:01.07 0.3 undecidable manual S 279 37.0296 93 -0.1 70
IV.EL6.EHZ. 2020-08-19T15:50:01.72 0.3 undecidable manual S 359 37.629 92 0.39 66
IV.GAVE.EHZ. 2020-08-19T15:50:01.52 0.3 undecidable manual S 208 37.4292 93 0.26 67
IV.MTRA.EHZ. 2020-08-19T15:50:00.38 0.3 undecidable manual S 138 34.8429 93 -0.19 68
IV.SNTG.HHE. 2020-08-19T15:50:00.01 0.6 undecidable manual S 335 32.4453 93 0.07 47
IV.MURB.HHZ. 2020-08-19T15:49:59.08 0.3 undecidable manual P 303 56.1993 91 0.17 66
IV.MF5.EHZ. 2020-08-19T15:49:59.23 0.3 undecidable manual S 90 28.3494 94 0.37 68
IV.SAP2.EHZ. 2020-08-19T15:49:58.72 0.3 undecidable manual S 63 26.2515 95 0.42 67
IV.TERO.HHZ. 2020-08-19T15:49:58.99 0.3 undecidable manual P 135 57.1983 91 -0.07 67
IV.ATCC.EHZ. 2020-08-19T15:49:57.15 0.3 undecidable manual P 300 43.8228 92 0.16 68
IV.MDAR.HNZ. 2020-08-19T15:49:57.09 0.6 undecidable manual S 7 22.6551 96 -0.25 46
IV.GAVE.EHZ. 2020-08-19T15:49:56.04 0.1 undecidable manual P 208 37.4292 93 0.04 94
IV.NRCA.HHZ. 2020-08-19T15:49:55.57 0.3 undecidable manual S 179 17.3715 103 -0.37 68
IV.PF6.EHE. 2020-08-19T15:49:55.64 0.3 undecidable manual S 23 17.7711 102 -0.41 67
IV.MTRA.EHZ. 2020-08-19T15:49:55.31 0.1 undecidable manual P 138 34.8429 93 -0.3 89
IV.SNTG.HHE. 2020-08-19T15:49:55.15 0.1 undecidable manual P 335 32.4453 93 -0.09 93
IV.CESI.HHZ. 2020-08-19T15:49:55.87 0.3 undecidable manual S 276 16.7721 104 0.09 72
IV.ASSB.HHZ. 2020-08-19T15:49:55.77 0.3 undecidable manual P 279 37.0296 93 -0.18 69
IV.MML1.EHE. 2020-08-19T15:49:55.92 0.3 undecidable manual S 321 17.6712 102 -0.11 72
IV.EL6.EHZ. 2020-08-19T15:49:55.90 0.1 undecidable manual P 359 37.629 92 -0.14 91
IV.MF5.EHZ. 2020-08-19T15:49:54.75 0.3 undecidable manual P 90 28.3494 94 0.14 71
IV.SAP2.EHZ. 2020-08-19T15:49:54.45 0.1 undecidable manual P 63 26.2515 95 0.16 94
IV.MC2.EHZ. 2020-08-19T15:49:54.38 0.3 undecidable manual S 144 10.7781 124 0.05 73
IV.MDAR.HNZ. 2020-08-19T15:49:53.52 0.1 undecidable manual P 7 22.6551 96 -0.22 92
IV.FDMO.HHZ. 2020-08-19T15:49:53.10 0.3 undecidable manual S 340 5.4945 149 -0.24 72
IV.MML1.EHE. 2020-08-19T15:49:53.01 0.1 undecidable manual P 321 17.6712 102 0.03 97
IV.FEMA.HNZ. 2020-08-19T15:49:53.48 0.3 undecidable manual S 238 5.7942 147 0.1 72
IV.GUMA.HNE. 2020-08-19T15:49:53.47 0.6 undecidable manual P 66 19.9689 99 0.14 48
IT.MTCL.HGZ. 2020-08-19T15:49:53.81 0.3 undecidable manual S 273 8.9799 132 -0.13 74
IV.CESI.HHZ. 2020-08-19T15:49:52.95 0.1 undecidable manual P 276 16.7721 104 0.11 96
IV.MC2.EHZ. 2020-08-19T15:49:52.09 0.1 undecidable manual P 144 10.7781 124 0.09 97
IV.NRCA.HHZ. 2020-08-19T15:49:52.81 0.1 undecidable manual P 179 17.3715 103 -0.12 96
IV.PF6.EHE. 2020-08-19T15:49:52.75 0.1 undecidable manual P 23 17.7711 102 -0.24 93
IT.MTCL.HGZ. 2020-08-19T15:49:51.83 0.1 undecidable manual P 273 8.9799 132 0.05 98
IV.FDMO.HHZ. 2020-08-19T15:49:51.41 0.1 undecidable manual P 340 5.4945 149 -0.02 100
IV.FEMA.HNZ. 2020-08-19T15:49:51.62 0.1 undecidable manual P 238 5.7942 147 0.17 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.4 0.000187 0.48 AML other m 2020-08-19T15:49:56.29
IV.CESI.HHN. ML:1.4 0.0002315 0.32 AML other m 2020-08-19T15:49:56.29
IV.ASSB.HHN. ML:1.1 0.000042749999999999996 0.42 AML other m 2020-08-19T15:50:01.61
IV.MTRA.EHN. ML:1.1 0.00005305 1.36 AML other m 2020-08-19T15:50:02.00
IV.GAVE.EHE. ML:1.6 0.000161 0.96 AML other m 2020-08-19T15:50:02.01
IV.GAVE.EHN. ML:1.7 0.000169 0.46 AML other m 2020-08-19T15:50:02.47
IV.MTRA.EHE. ML:1.3 0.00007450000000000001 0.2 AML other m 2020-08-19T15:50:02.47
IV.ASSB.HHE. ML:1.1 0.0000459 0.46 AML other m 2020-08-19T15:50:03.02
IV.ATCC.EHE. ML:1.2 0.00004355 0.9 AML other m 2020-08-19T15:50:03.80
IV.ATCC.EHN. ML:1.0 0.0000313 0.38 AML other m 2020-08-19T15:50:04.12
IV.TERO.HHE. ML:1.0 0.0000218 0.84 AML other m 2020-08-19T15:50:08.74
IV.TERO.HHN. ML:1.1 0.000024449999999999998 1.26 AML other m 2020-08-19T15:50:09.74
IV.MURB.HHN. ML:1.3 0.000038650000000000004 0.92 AML other m 2020-08-19T15:50:11.94
IV.MURB.HHE. ML:1.3 0.0000376 0.66 AML other m 2020-08-19T15:50:16.83
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download