Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 03-12-2021 and time 14:45:20 (Italy) in region 2 km E Cerreto di Spoleto (PG)

A magnitude ML 1.6 earthquake occured in region: 2 km E Cerreto di Spoleto (PG), on

  • 03-12-2021 13:45:20 (UTC)
  • 03-12-2021 14:45:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8160, 12.9380 at 10 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 2 1075 1075
Vallo di Nera PG 8 364 1439
Sellano PG 8 1079 2518
Preci PG 11 724 3242
Poggiodomo PG 12 117 3359
Sant'Anatolia di Narco PG 12 564 3923
Cascia PG 13 3217 7140
Norcia PG 13 4957 12097
Campello sul Clitunno PG 13 2442 14539
Scheggino PG 14 461 15000
Trevi PG 17 8469 23469
Visso MC 18 1107 24576
Monteleone di Spoleto PG 18 599 25175
Spoleto PG 19 38218 63393
Castelsantangelo sul Nera MC 20 281 63674

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SE of Foligno (57155 inhabitants)
37 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
65 Km W of Teramo (54892 inhabitants)
81 Km NE of Viterbo (67173 inhabitants)
92 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 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 1.6 2021-12-03
13:45:20		 42.8165 12.938 10 2022-03-30
13:04:32		 Bollettino Sismico Italiano INGV 100275521
Reviewed
Rev100 		ML 1.5 2021-12-03
13:45:20		 42.819 12.9438 11 2021-12-03
13:52:00		 Sala Sismica INGV-Roma 98094731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-03 13:45:20 ± 0.05
Latitude 42.8165 ± 0.0027
Longitude 12.9380 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100275521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52610
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 27
Type of magnitude ML
Reference to an origin 98094731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-03 13:52:00

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 35
Type of magnitude ML
Reference to an origin 100275521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-28 15:47:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-12-03T13:45:52.88 3.0 undecidable manual S -3.62 0
IV.OSSC.HHZ. 2021-12-03T13:45:46.96 3.0 undecidable manual P 1.64 0
IV.EL6.EHZ. 2021-12-03T13:45:39.14 0.6 undecidable manual S 13 58.3971 50 0.58 41
IV.MF5.EHN. 2021-12-03T13:45:36.21 0.6 undecidable manual S 66 46.4202 50 0.85 38
IV.PF6.EHN. 2021-12-03T13:45:34.19 0.6 undecidable manual S 30 41.3253 50 0.21 46
IV.CSP1.EHZ. 2021-12-03T13:45:33.25 0.6 undecidable manual S 35 37.4292 50 0.29 46
IV.MTRA.EHE. 2021-12-03T13:45:33.05 0.6 undecidable manual S 100 37.9287 50 -0.03 48
IV.ASSB.HHZ. 2021-12-03T13:45:31.79 0.6 undecidable manual S 318 33.8439 50 -0.2 47
IV.MOMA.HHZ. 2021-12-03T13:45:31.28 0.6 undecidable manual S 267 29.9478 50 0.32 46
IV.MML1.EHZ. 2021-12-03T13:45:31.76 0.6 undecidable manual S 5 33.0447 50 -0.03 49
IV.ARRO.EHZ. 2021-12-03T13:45:30.98 0.6 undecidable manual S 208 29.8479 50 0.05 49
IV.EL6.EHZ. 2021-12-03T13:45:30.69 0.3 undecidable manual P 13 58.3971 50 -0.13 69
IV.LNSS.HHZ. 2021-12-03T13:45:29.30 0.6 undecidable manual S 161 25.1526 112 -0.33 47
IV.MF5.EHN. 2021-12-03T13:45:29.34 0.3 undecidable manual P 66 46.4202 50 0.36 67
IV.FDMO.HHZ. 2021-12-03T13:45:29.99 0.6 undecidable manual S 26 27.2505 50 -0.25 47
IV.RM33.EHZ. 2021-12-03T13:45:28.13 0.6 undecidable manual P 146 40.9257 50 0.01 48
IV.CESI.HHZ. 2021-12-03T13:45:28.40 0.6 undecidable manual S 353 21.0678 115 0.06 50
IV.MC2.EHZ. 2021-12-03T13:45:28.85 0.6 undecidable manual S 63 22.9548 113 -0.09 49
IV.CESX.HHE. 2021-12-03T13:45:27.45 0.3 undecidable manual P 231 36.741 50 -0.04 73
IV.FEMA.HNE. 2021-12-03T13:45:27.65 0.6 undecidable manual S 29 18.5703 118 0.1 50
IT.MTCL.HGE. 2021-12-03T13:45:27.88 0.6 undecidable manual S 14 20.2686 116 -0.22 48
IV.PF6.EHN. 2021-12-03T13:45:27.90 0.3 undecidable manual P 30 41.3253 50 -0.28 69
IV.SMA1.EHZ. 2021-12-03T13:45:27.78 0.6 undecidable manual P 122 38.4282 50 0.05 48
IV.CSP1.EHZ. 2021-12-03T13:45:27.35 0.3 undecidable manual P 35 37.4292 50 -0.24 70
IV.MTRA.EHE. 2021-12-03T13:45:27.29 0.3 undecidable manual P 100 37.9287 50 -0.37 68
IV.MOMA.HHZ. 2021-12-03T13:45:26.60 0.3 undecidable manual P 267 29.9478 50 0.16 72
IV.MML1.EHZ. 2021-12-03T13:45:26.80 0.3 undecidable manual P 5 33.0447 50 -0.11 72
IV.ASSB.HHZ. 2021-12-03T13:45:26.88 0.3 undecidable manual P 318 33.8439 50 -0.15 72
IV.NRCA.HHZ. 2021-12-03T13:45:26.28 0.6 undecidable manual S 82 14.4744 125 -0.06 50
IV.ARRO.EHZ. 2021-12-03T13:45:26.05 0.3 undecidable manual P 208 29.8479 50 -0.37 69
IV.GAVE.EHZ. 2021-12-03T13:45:26.58 0.6 undecidable manual S 195 14.2746 125 0.3 48
IV.MC2.EHZ. 2021-12-03T13:45:25.30 0.3 undecidable manual P 63 22.9548 113 0.03 75
IV.LNSS.HHZ. 2021-12-03T13:45:25.51 0.3 undecidable manual P 161 25.1526 112 -0.16 73
IV.FDMO.HHZ. 2021-12-03T13:45:25.81 0.1 positive manual P 26 27.2505 50 -0.21 95
IV.CESI.HHZ. 2021-12-03T13:45:24.95 0.1 undecidable manual P 353 21.0678 115 0.03 100
IV.GAVE.EHZ. 2021-12-03T13:45:24.08 0.1 positive manual P 195 14.2746 125 0.34 95
IV.FEMA.HNE. 2021-12-03T13:45:24.56 0.1 undecidable manual P 29 18.5703 118 0.09 99
IT.MTCL.HGE. 2021-12-03T13:45:24.69 0.1 undecidable manual P 14 20.2686 116 -0.09 99
IV.NRCA.HHZ. 2021-12-03T13:45:23.86 0.1 negative manual P 82 14.4744 125 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.2 0.0014281359999999998 0.16 AML other m 2021-12-03T13:45:26.38
IV.NRCA.HNN. ML:2.1 0.001382902 0.1472 AML other m 2021-12-03T13:45:26.39
IV.NRCA.HNE. ML:1.9 0.00074934075 0.0896 AML other m 2021-12-03T13:45:26.81
IV.NRCA.HHE. ML:1.9 0.0007854167 0.096 AML other m 2021-12-03T13:45:26.81
IV.GAVE.EHE. ML:2.1 0.00121884665 0.1152 AML other m 2021-12-03T13:45:26.90
IV.GAVE.HNE. ML:2.1 0.00125995465 0.1472 AML other m 2021-12-03T13:45:26.90
IV.GAVE.HNN. ML:1.2 0.00014794749 0.0896 AML other m 2021-12-03T13:45:27.10
IV.GAVE.EHN. ML:1.7 0.00048307745000000004 0.0832 AML other m 2021-12-03T13:45:27.11
IV.CESI.HHN. ML:1.5 0.0001983923 0.1408 AML other m 2021-12-03T13:45:28.65
IV.CESI.HNE. ML:1.3 0.00013613675 1.8976 AML other m 2021-12-03T13:45:28.03
IV.CESI.HHE. ML:1.3 0.00014250000000000002 0.74 AML other m 2021-12-03T13:45:29.57
IV.LNSS.HNN. ML:1.5 0.00018902405 0.1792 AML other m 2021-12-03T13:45:29.66
IV.LNSS.HHN. ML:1.6 0.00020926165000000003 0.1792 AML other m 2021-12-03T13:45:29.66
IV.LNSS.HNE. ML:1.5 0.00019456374999999999 0.0832 AML other m 2021-12-03T13:45:29.83
IV.LNSS.HHE. ML:1.6 0.0002223891 0.0768 AML other m 2021-12-03T13:45:29.84
IV.CESI.HNN. ML:1.7 0.0003427797 1.6224 AML other m 2021-12-03T13:45:29.92
IV.FDMO.HHE. ML:1.3 0.0001173278 0.1152 AML other m 2021-12-03T13:45:30.32
IV.MC2.EHN. ML:1.7 0.0003307213 0.2368 AML other m 2021-12-03T13:45:30.49
IV.FDMO.HHN. ML:1.4 0.000136 0.34 AML other m 2021-12-03T13:45:30.61
IV.MOMA.HNN. ML:1.6 0.0001838853 0.672 AML other m 2021-12-03T13:45:31.40
IV.MC2.EHE. ML:1.4 0.00017933357 0.1984 AML other m 2021-12-03T13:45:31.05
IV.MOMA.HHN. ML:1.1 0.000062778675 0.2176 AML other m 2021-12-03T13:45:31.35
IV.MOMA.HHE. ML:1.1 0.00006409933500000001 0.1344 AML other m 2021-12-03T13:45:31.94
IV.MML1.HNE. ML:1.8 0.00026349999999999995 0.2 AML other m 2021-12-03T13:45:32.10
IV.MML1.EHE. ML:1.8 0.000249 0.2 AML other m 2021-12-03T13:45:32.11
IV.ASSB.HHN. ML:1.7 0.00021247079999999998 0.1792 AML other m 2021-12-03T13:45:32.16
IV.MML1.HNN. ML:1.6 0.000183456285 0.2624 AML other m 2021-12-03T13:45:32.20
IV.MML1.EHN. ML:1.6 0.000185 0.22 AML other m 2021-12-03T13:45:32.20
IV.ASSB.HHE. ML:1.5 0.0001246581 0.16 AML other m 2021-12-03T13:45:32.37
IV.SMA1.EHN. ML:1.2 0.000063172945 0.6592 AML other m 2021-12-03T13:45:33.47
IV.RM33.EHN. ML:1.2 0.000054576945 0.2432 AML other m 2021-12-03T13:45:34.38
IV.SMA1.EHE. ML:1.4 0.000089303955 0.1792 AML other m 2021-12-03T13:45:35.34
IV.RM33.EHE. ML:1.4 0.00008357419 1.6416 AML other m 2021-12-03T13:45:36.03
IV.RM33.HNN. ML:1.4 0.00008186494999999999 0.3584 AML other m 2021-12-03T13:45:43.79
IV.RM33.HNE. ML:1.8 0.00022063733500000003 1.1744 AML other m 2021-12-03T13:45:46.83
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