Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 16-08-2021 and time 05:53:46 (Italy) in region 1 km E Monte Cavallo (MC)

A magnitude ML 1.1 earthquake occured in region: 1 km E Monte Cavallo (MC), on

  • 16-08-2021 03:53:46 (UTC)
  • 16-08-2021 05:53:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9890, 13.0160 at 11 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
Monte Cavallo MC 1 145 145
Pieve Torina MC 7 1458 1603
Fiordimonte MC 8 202 1805
Visso MC 9 1107 2912
Pievebovigliana MC 10 866 3778
Serravalle di Chienti MC 11 1070 4848
Muccia MC 11 915 5763
Ussita MC 11 444 6207
Preci PG 12 724 6931
Fiastra MC 13 559 7490
Sellano PG 13 1079 8569
Acquacanina MC 14 121 8690
Castelsantangelo sul Nera MC 15 281 8971
Camerino MC 17 6974 15945
Bolognola MC 17 142 16087
Sefro MC 18 422 16509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km E of Foligno (57155 inhabitants)
53 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
67 Km NW of Teramo (54892 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
98 Km NE of Viterbo (67173 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 1.1 2021-08-16
03:53:46		 42.9892 13.0163 11 2021-12-29
11:12:21		 Bollettino Sismico Italiano INGV 94369581
Reviewed
Rev100 		ML 1.3 2021-08-16
03:53:46		 42.9903 13.0213 12 2021-08-16
03:59:37		 Sala Sismica INGV-Roma 94230811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-16 03:53:46 ± 0.07
Latitude 42.9892 ± 0.0036
Longitude 13.0163 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94369581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 488
Semi-minor axis of confidence ellipse (meter) 243
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 94369581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-19 10:45:28

ML:1.3

Field Value
Value 1.3
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 94230811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-16 03:59:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MILN.HHZ. 2021-08-16T03:55:20.22 3.0 undecidable manual Sn 4.42 0
IV.TREG.EHZ. 2021-08-16T03:55:16.17 3.0 undecidable manual Sg 20.219999 0
MN.TIR.HHZ. 2021-08-16T03:55:12.85 3.0 undecidable manual Pg 37.34 0
IV.ESCV.HHZ. 2021-08-16T03:54:57.75 3.0 negative manual Pg 17.530001 0
MN.BNI.HHZ. 2021-08-16T03:54:52.94 3.0 undecidable manual Pn 10.34 0
IV.SGRT.HHZ. 2021-08-16T03:54:51.93 3.0 undecidable manual Sg 18.51 0
IV.ORZI.HHZ. 2021-08-16T03:54:42.32 3.0 negative manual Pg 22.65 0
OT.CGL1.HHZ. 2021-08-16T03:54:35.34 3.0 undecidable manual Pn 14.86 0
GU.IMI.HHZ. 2021-08-16T03:54:32.84 3.0 undecidable manual Pn 4.95 0
IV.CRAC.EHZ. 2021-08-16T03:54:31.66 3.0 undecidable manual Pg 15.86 0
IV.TREG.EHZ. 2021-08-16T03:54:30.54 3.0 positive manual Pg 16.77 0
GU.GRAM.HHZ. 2021-08-16T03:54:25.29 3.0 negative manual Pg 12.87 0
IV.SPS2.HHZ. 2021-08-16T03:54:25.65 3.0 positive manual Pn -0.77 0
IV.TST02.HHZ. 2021-08-16T03:54:22.43 3.0 undecidable manual Sg 1.53 0
IV.MTMR.EHZ. 2021-08-16T03:54:19.02 3.0 undecidable manual Pg 14.88 0
IV.LAV9.HHZ. 2021-08-16T03:54:00.65 3.0 negative manual Pg 4.14 0
IV.SRES.HHZ. 2021-08-16T03:53:56.60 3.0 positive manual Pg 2.67 0
IV.MMO1.EHZ. 2021-08-16T03:53:55.90 0.1 undecidable manual S 111 27.0507 50 -0.29 92
IV.MF5.EHZ. 2021-08-16T03:53:54.11 0.1 undecidable manual P 90 35.9418 50 0.69 80
IV.NRCA.HHZ. 2021-08-16T03:53:53.67 0.1 undecidable manual S 155 18.9699 119 -0.27 94
IV.NARO.HHZ. 2021-08-16T03:53:53.34 3.0 negative manual Pn -0.15 0
IV.MC2.EHZ. 2021-08-16T03:53:53.36 0.1 undecidable manual S 122 16.4724 123 0.18 96
IV.ATCC.EHZ. 2021-08-16T03:53:53.58 0.1 undecidable manual P 306 37.4292 50 -0.07 95
IV.CSP1.EHZ. 2021-08-16T03:53:53.85 0.1 undecidable manual S 53 19.0698 119 -0.11 97
IV.LPEL.HHZ. 2021-08-16T03:53:53.73 3.0 positive manual Pn 0.49 0
IV.MML1.EHZ. 2021-08-16T03:53:52.40 0.1 undecidable manual S 345 14.2746 127 -0.16 97
IV.ASSB.HHZ. 2021-08-16T03:53:52.44 0.1 undecidable manual P 282 29.6481 50 0 97
IV.MMO1.EHZ. 2021-08-16T03:53:51.98 0.1 undecidable manual P 111 27.0507 50 -0.07 96
IV.CESI.HHZ. 2021-08-16T03:53:51.32 0.1 undecidable manual S 281 9.2796 139 0.05 100
IV.CSP1.EHZ. 2021-08-16T03:53:50.68 0.1 undecidable manual P 53 19.0698 119 -0.08 98
IV.FEMA.HNZ. 2021-08-16T03:53:50.41 0.1 undecidable manual S 138 3.996 159 0.08 100
IV.FDMO.HHE. 2021-08-16T03:53:50.87 0.1 undecidable manual S 48 7.7811 144 -0.09 99
IV.NRCA.HHZ. 2021-08-16T03:53:50.44 0.1 undecidable manual P 155 18.9699 119 -0.31 93
IV.MC2.EHZ. 2021-08-16T03:53:50.55 0.1 undecidable manual P 122 16.4724 123 0.24 95
IV.CESI.HHZ. 2021-08-16T03:53:49.29 0.1 undecidable manual P 281 9.2796 139 0.08 99
IV.MML1.EHZ. 2021-08-16T03:53:49.92 0.1 positive manual P 345 14.2746 127 -0.03 99
IV.FDMO.HHE. 2021-08-16T03:53:49.08 0.1 positive manual P 48 7.7811 144 0.05 100
IV.FEMA.HNZ. 2021-08-16T03:53:48.85 0.1 undecidable manual P 138 3.996 159 0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.9 0.0001065 0.18 AML other m 2021-08-16T03:53:51.49
IV.CESI.HHN. ML:1.0 0.0001424 0.88 AML other m 2021-08-16T03:53:51.51
IV.MML1.EHN. ML:1.0 0.00009695000000000001 0.12 AML other m 2021-08-16T03:53:52.72
IV.MML1.EHE. ML:0.9 0.00007445000000000001 0.16 AML other m 2021-08-16T03:53:52.80
IV.NRCA.HHN. ML:1.3 0.00016 0.14 AML other m 2021-08-16T03:53:53.73
IV.NRCA.HHE. ML:1.2 0.00010899999999999999 0.42 AML other m 2021-08-16T03:53:53.95
IV.CSP1.EHN. ML:1.2 0.0001265 1.78 AML other m 2021-08-16T03:53:54.91
IV.CSP1.EHE. ML:1.2 0.0001365 0.46 AML other m 2021-08-16T03:53:54.57
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