Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-12-2021 and time 10:54:06 (UTC) in region 3 km E Cerreto di Spoleto (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km E Cerreto di Spoleto (PG), on

  • 23-12-2021 10:54:06 (UTC)
  • 23-12-2021 11:54:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8280, 12.9530 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 7 1079 2154
Preci PG 9 724 2878
Vallo di Nera PG 10 364 3242
Norcia PG 12 4957 8199
Poggiodomo PG 13 117 8316
Cascia PG 13 3217 11533
Sant'Anatolia di Narco PG 14 564 12097
Campello sul Clitunno PG 14 2442 14539
Visso MC 16 1107 15646
Scheggino PG 16 461 16107
Trevi PG 18 8469 24576
Castelsantangelo sul Nera MC 18 281 24857
Monte Cavallo MC 19 145 25002
Monteleone di Spoleto PG 20 599 25601

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
97 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 1.1 2021-12-23
10:54:06		 42.8277 12.953 11 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102367361
Reviewed
Rev100 		ML 1.1 2021-12-23
10:54:06		 42.8233 12.938 14 2021-12-23
11:01:15		 Sala Sismica INGV-Roma 98846741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 10:54:06 ± 0.05
Latitude 42.8277 ± 0.0027
Longitude 12.9530 ± 0.0061
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 102367361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 507
Semi-minor axis of confidence ellipse (meter) 259
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 108
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23382
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 98846741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 11:01:15

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 102367361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-25 14:24:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2021-12-23T10:55:13.12 3.0 undecidable manual Sn -4.89 0
IV.MDAR.HNZ. 2021-12-23T10:55:06.74 3.0 undecidable manual Sn -4.72 0
IV.FIR.HHZ. 2021-12-23T10:54:54.09 3.0 undecidable manual Pg 20.08 0
MN.TRI.HHZ. 2021-12-23T10:54:46.82 3.0 positive manual Pn 0.78 0
IV.BRSN.EHZ. 2021-12-23T10:54:45.86 3.0 negative manual Pg 11 0
HL.VLS.HHZ. 2021-12-23T10:54:38.45 3.0 undecidable manual Sg 0.17 0
IV.CPGN.EHZ. 2021-12-23T10:54:36.66 3.0 undecidable manual Pg 8.67 0
IV.CELB.HHZ. 2021-12-23T10:54:33.99 3.0 undecidable manual Pn 2.15 0
IV.LRP.EHZ. 2021-12-23T10:54:32.29 3.0 undecidable manual Sn -3.48 0
IV.LNSS.HHZ. 2021-12-23T10:54:15.66 0.6 undecidable manual S 164 25.9518 50 -0.07 49
IV.FDMO.HHZ. 2021-12-23T10:54:15.58 0.6 undecidable manual S 25 25.5522 50 -0.07 49
IV.CESI.HHZ. 2021-12-23T10:54:13.98 0.6 undecidable manual S 349 20.0688 50 -0.18 48
IV.NRCA.HHZ. 2021-12-23T10:54:12.10 0.6 undecidable manual S 87 13.1757 130 -0.15 49
IV.GAVE.EHZ. 2021-12-23T10:54:12.75 0.6 undecidable manual S 198 15.7731 125 -0.23 48
IV.LNSS.HHZ. 2021-12-23T10:54:11.81 0.3 undecidable manual P 164 25.9518 50 0.05 74
IV.FDMO.HHZ. 2021-12-23T10:54:11.81 0.3 undecidable manual P 25 25.5522 50 0.1 73
IV.GAVE.EHZ. 2021-12-23T10:54:10.28 0.1 undecidable manual P 198 15.7731 125 0.12 99
IV.CESI.HHZ. 2021-12-23T10:54:10.88 0.1 undecidable manual P 349 20.0688 50 0.03 100
IV.NRCA.HHZ. 2021-12-23T10:54:09.84 0.3 undecidable manual P 87 13.1757 130 0.1 75
IV.HVZN.HNZ. 2021-12-23T10:54:09.07 3.0 undecidable manual Sg 2.49 0
IV.ESML.HHZ. 2021-12-23T10:54:00.22 3.0 undecidable manual Sg 4.02 0
IV.PZUN.HHZ. 2021-12-23T10:53:50.87 3.0 undecidable manual S -4.75 0
IV.GATE.HHZ. 2021-12-23T10:53:50.17 3.0 negative manual Pg 2.18 0
IV.MMGO.HHZ. 2021-12-23T10:53:47.99 3.0 positive manual Pn -2.13 0
AC.VLO.HHZ. 2021-12-23T10:53:43.92 3.0 undecidable manual Pn -6.19 0
IV.CROCE.HHZ. 2021-12-23T10:53:43.50 3.0 undecidable manual Pn -1.63 0
IV.MCRV.HHZ. 2021-12-23T10:53:42.23 3.0 undecidable manual Pg 4.37 0
IV.MILZ.HHZ. 2021-12-23T10:53:41.14 3.0 undecidable manual Sg 0.64 0
IV.IVPL.HHZ. 2021-12-23T10:53:39.93 3.0 undecidable manual S -2.89 0
IV.GIZZ.HHZ. 2021-12-23T10:53:25.32 3.0 undecidable manual Sg 2.19 0
IV.TDS.HHZ. 2021-12-23T10:53:19.26 3.0 undecidable manual Pg -1.51 0
IV.MILZ.HHZ. 2021-12-23T10:53:19.54 3.0 undecidable manual P -5.94 0
IV.FERC.HHZ.00 2021-12-23T10:53:12.96 3.0 positive manual P -5.96 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:0.9 0.000071658605 0.1216 AML other m 2021-12-23T10:54:13.18
IV.GAVE.EHN. ML:0.9 0.00006948638 0.1408 AML other m 2021-12-23T10:54:13.35
IV.NRCA.HHN. ML:0.5 0.00003553919499999999 0.1216 AML other m 2021-12-23T10:54:13.94
IV.NRCA.HHE. ML:0.5 0.00003354802 0.1216 AML other m 2021-12-23T10:54:14.39
IV.LNSS.HNE. ML:1.3 0.00012232128500000002 0.5504 AML other m 2021-12-23T10:54:14.26
IV.LNSS.HHN. ML:0.7 0.00002768972 1.84 AML other m 2021-12-23T10:54:15.01
IV.NRCA.HNN. ML:1.4 0.0002399877 0.7328 AML other m 2021-12-23T10:54:16.52
IV.LNSS.HHE. ML:0.8 0.000036002015 0.1216 AML other m 2021-12-23T10:54:16.23
IV.NRCA.HNE. ML:1.2 0.00017227330000000002 1.4368 AML other m 2021-12-23T10:54:21.25
IV.LNSS.HNN. ML:1.5 0.00017463195 0.7808 AML other m 2021-12-23T10:54:33.50
IV.GAVE.HNE. ML:1.2 0.00012764365 1.0368 AML other m 2021-12-23T10:54:37.19
IV.GAVE.HNN. ML:1.3 0.00019444129999999997 0.7552 AML other m 2021-12-23T10:54:38.55
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