Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-10-2021 and time 02:13:42 (UTC) in region 3 km NE Cerreto di Spoleto (PG)

A magnitude ML 1.5 earthquake occured in region: 3 km NE Cerreto di Spoleto (PG), on

  • 16-10-2021 02:13:42 (UTC)
  • 16-10-2021 04:13:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8350, 12.9410 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
Cerreto di Spoleto PG 3 1075 1075
Sellano PG 6 1079 2154
Preci PG 9 724 2878
Vallo di Nera PG 10 364 3242
Norcia PG 13 4957 8199
Campello sul Clitunno PG 13 2442 10641
Poggiodomo PG 14 117 10758
Sant'Anatolia di Narco PG 14 564 11322
Cascia PG 14 3217 14539
Visso MC 16 1107 15646
Scheggino PG 16 461 16107
Trevi PG 16 8469 24576
Monte Cavallo MC 18 145 24721
Castelsantangelo sul Nera MC 19 281 25002
Spoleto PG 20 38218 63220

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
54 Km SE of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
99 Km SW of Ancona (100861 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 1.5 2021-10-16
02:13:42		 42.8353 12.9413 11 2022-03-30
13:04:15		 Bollettino Sismico Italiano INGV 97272361
Reviewed
Rev100 		ML 1.4 2021-10-16
02:13:42		 42.8367 12.9418 11 2021-10-16
03:07:48		 Sala Sismica INGV-Roma 96633071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-16 02:13:42 ± 0.04
Latitude 42.8353 ± 0.0018
Longitude 12.9413 ± 0.0037
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 97272361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 275
Semi-minor axis of confidence ellipse (meter) 92
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 116
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.12680
Epicentral distance of station farthest from the epicenter (degree) 0.34534
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 97272361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-09 10:11:07

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96633071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-16 03:07:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESX.HHE. 2021-10-16T02:13:54.84 0.3 undecidable manual S 229 38.3283 50 0.03 72
IV.CSP1.EHZ. 2021-10-16T02:13:54.17 0.3 undecidable manual S 37 35.6421 50 0.09 72
IV.ARRO.EHZ. 2021-10-16T02:13:53.07 0.6 undecidable manual S 207 31.8459 50 0 49
IV.MOMA.HNZ. 2021-10-16T02:13:53.24 0.6 undecidable manual S 264 30.4473 50 0.54 44
IV.MMO1.EHZ. 2021-10-16T02:13:53.23 0.6 undecidable manual S 77 32.1456 50 0.07 48
IV.ASSB.HHZ. 2021-10-16T02:13:52.92 0.6 undecidable manual S 315 32.4453 50 -0.33 46
IV.MML1.EHZ. 2021-10-16T02:13:52.83 0.3 undecidable manual S 5 30.9468 50 -0.01 73
IV.FDMO.HHZ. 2021-10-16T02:13:51.12 0.3 undecidable manual S 28 25.2525 50 -0.21 71
IV.LNSS.HHZ. 2021-10-16T02:13:51.55 0.6 undecidable manual S 163 27.0507 50 -0.24 47
IV.MC2.EHZ. 2021-10-16T02:13:50.70 0.3 undecidable manual S 67 21.867 50 0.29 71
IV.FEMA.HNZ. 2021-10-16T02:13:49.13 0.3 undecidable manual S 32 16.5723 123 0.28 71
IV.CESX.HHE. 2021-10-16T02:13:49.22 0.1 undecidable manual P 229 38.3283 50 -0.18 93
IT.MTCL.HGZ. 2021-10-16T02:13:49.12 0.6 undecidable manual S 15 18.2706 120 -0.21 48
IV.CESI.HHZ. 2021-10-16T02:13:49.46 0.3 undecidable manual S 351 19.0698 119 -0.12 73
IV.NRCA.HHZ. 2021-10-16T02:13:48.06 0.3 undecidable manual S 91 14.0748 127 -0.07 75
IV.MMO1.EHZ. 2021-10-16T02:13:48.39 0.1 undecidable manual P 77 32.1456 50 -0.06 97
IV.CSP1.EHZ. 2021-10-16T02:13:48.96 0.1 positive manual P 37 35.6421 50 -0.03 97
IV.GAVE.EHZ. 2021-10-16T02:13:48.68 0.3 undecidable manual S 194 16.3725 123 -0.09 74
IV.ARRO.EHZ. 2021-10-16T02:13:48.39 0.1 undecidable manual P 207 31.8459 50 -0.01 98
IV.ASSB.HHZ. 2021-10-16T02:13:48.52 0.3 undecidable manual P 315 32.4453 50 0.01 73
IV.MML1.EHZ. 2021-10-16T02:13:48.25 0.1 positive manual P 5 30.9468 50 -0.02 98
IV.MOMA.HNZ. 2021-10-16T02:13:48.52 0.3 undecidable manual P 264 30.4473 50 0.34 69
IV.FDMO.HHZ. 2021-10-16T02:13:47.29 0.1 positive manual P 28 25.2525 50 -0.1 97
IV.LNSS.HHZ. 2021-10-16T02:13:47.52 0.1 undecidable manual P 163 27.0507 50 -0.14 96
IV.CESI.HHZ. 2021-10-16T02:13:46.37 0.1 positive manual P 351 19.0698 119 -0.02 100
IV.MC2.EHZ. 2021-10-16T02:13:46.93 0.1 positive manual P 67 21.867 50 0.07 99
IV.FEMA.HNZ. 2021-10-16T02:13:46.06 0.1 undecidable manual P 32 16.5723 123 0.09 99
IV.GAVE.EHZ. 2021-10-16T02:13:46.03 0.1 undecidable manual P 194 16.3725 123 0.11 99
IT.MTCL.HGZ. 2021-10-16T02:13:46.16 0.3 undecidable manual P 15 18.2706 120 -0.08 74
IV.NRCA.HHZ. 2021-10-16T02:13:45.62 0.1 positive manual P 91 14.0748 127 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.7 0.0005095000000000001 0.14 AML other m 2021-10-16T02:13:48.14
IV.NRCA.HNN. ML:1.7 0.0004809 0.1392 AML other m 2021-10-16T02:13:48.14
IV.NRCA.HHE. ML:1.5 0.0002945 0.06 AML other m 2021-10-16T02:13:48.34
IV.NRCA.HNE. ML:1.4 0.0002723418 0.0704 AML other m 2021-10-16T02:13:48.31
IV.GAVE.HNE. ML:1.7 0.00044891265 0.1104 AML other m 2021-10-16T02:13:49.17
IV.GAVE.EHE. ML:1.6 0.00038568885 0.1392 AML other m 2021-10-16T02:13:49.16
IV.GAVE.EHN. ML:1.8 0.0005285 1.38 AML other m 2021-10-16T02:13:49.24
IV.FDMO.HHN. ML:1.1 0.00007980000000000002 0.7 AML other m 2021-10-16T02:13:51.65
IV.FDMO.HHE. ML:1.3 0.00010275 0.2 AML other m 2021-10-16T02:13:51.53
IV.LNSS.HHE. ML:1.6 0.00019350000000000001 1.1 AML other m 2021-10-16T02:13:51.77
IV.LNSS.HHN. ML:1.4 0.0001285 0.84 AML other m 2021-10-16T02:13:52.35
IV.MML1.EHE. ML:1.2 0.00007744999999999999 0.74 AML other m 2021-10-16T02:13:53.08
IV.MML1.EHN. ML:1.1 0.0000624 0.22 AML other m 2021-10-16T02:13:53.29
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