Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-12-2021 and time 15:44:22 (Italy) in region 5 km S Scheggino (PG)

A magnitude ML 1.4 earthquake occured in region: 5 km S Scheggino (PG), on

  • 18-12-2021 14:44:22 (UTC)
  • 18-12-2021 15:44:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6680, 12.8480 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
Scheggino PG 5 461 461
Ferentillo TR 7 1913 2374
Sant'Anatolia di Narco PG 8 564 2938
Monteleone di Spoleto PG 9 599 3537
Poggiodomo PG 9 117 3654
Polino TR 9 233 3887
Montefranco TR 10 1276 5163
Arrone TR 11 2763 7926
Vallo di Nera PG 12 364 8290
Spoleto PG 12 38218 46508
Cascia PG 15 3217 49725
Leonessa RI 15 2435 52160
Morro Reatino RI 16 373 52533
Labro RI 16 374 52907
Rivodutri RI 17 1253 54160
Cerreto di Spoleto PG 18 1075 55235
Campello sul Clitunno PG 18 2442 57677
Poggio Bustone RI 19 2055 59732
Colli sul Velino RI 19 533 60265

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Terni (111501 inhabitants)
34 Km SE of Foligno (57155 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
62 Km SE of Perugia (166134 inhabitants)
67 Km E of Viterbo (67173 inhabitants)
70 Km W of Teramo (54892 inhabitants)
75 Km N of Guidonia Montecelio (88673 inhabitants)
78 Km N of Tivoli (56533 inhabitants)
91 Km NE of Roma (2864731 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 1.4 2021-12-18
14:44:22		 42.6675 12.8478 12 2022-03-30
13:04:23		 Bollettino Sismico Italiano INGV 98822821
Reviewed
Rev100 		ML 1.3 2021-12-18
14:44:22		 42.6778 12.8513 11 2021-12-18
14:50:49		 Sala Sismica INGV-Roma 98680981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-18 14:44:22 ± 0.06
Latitude 42.6675 ± 0.0036
Longitude 12.8478 ± 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 98822821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 318
Semi-minor axis of confidence ellipse (meter) 225
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 58
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 58
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.49822
Number of stations at which the event was observed 44
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 98680981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-18 14:50:49

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 98822821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-22 15:06:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2021-12-18T14:45:57.08 3.0 undecidable manual Sg 13.7 0
OX.DRE.HHZ. 2021-12-18T14:45:51.49 3.0 undecidable manual Sg 12.78 0
IV.ZEN8.EHZ. 2021-12-18T14:45:43.79 3.0 undecidable manual Sg 8.53 0
IV.PCN.EHZ. 2021-12-18T14:45:39.76 3.0 undecidable manual Sg 4.57 0
OX.MPRI.HHZ. 2021-12-18T14:45:39.99 3.0 undecidable manual Sn 0.71 0
IX.RSF3.HHZ.02 2021-12-18T14:45:35.98 3.0 undecidable manual Sg 11.38 0
IV.HAGA.HHZ. 2021-12-18T14:45:30.68 3.0 negative manual Pn -2.33 0
IV.MCRV.HHZ. 2021-12-18T14:45:29.38 3.0 undecidable manual Sn 1.77 0
IV.VITU.HHZ. 2021-12-18T14:45:29.36 3.0 undecidable manual Sg 13.68 0
IV.CLTA.HHZ. 2021-12-18T14:45:23.20 3.0 undecidable manual Pn -8.83 0
CR.ZAG.BHZ. 2021-12-18T14:45:20.00 3.0 undecidable manual Pg 17.379999 0
IV.PTRJ.HHZ. 2021-12-18T14:45:19.95 3.0 undecidable manual Sg 8.13 0
IV.VBKN.HHZ. 2021-12-18T14:45:16.12 3.0 undecidable manual Sn -4.19 0
IV.MILN.HHZ. 2021-12-18T14:45:14.62 3.0 positive manual Pg 11.52 0
IV.ECTS.HHZ. 2021-12-18T14:45:14.26 3.0 undecidable manual Pn -9.99 0
OT.OT17.EHZ. 2021-12-18T14:45:13.30 3.0 undecidable manual Sn -3.08 0
TV.GMB1.HHZ. 2021-12-18T14:45:12.39 3.0 negative manual Pn -9.99 0
IV.PAOL.HHZ. 2021-12-18T14:45:09.20 3.0 undecidable manual Sn -8.55 0
IV.SACR.HNZ. 2021-12-18T14:45:09.22 3.0 undecidable manual Sn -3.72 0
IV.IMOL.HNZ. 2021-12-18T14:45:09.29 3.0 undecidable manual Sg 4.4 0
RF.GEPF.HHZ. 2021-12-18T14:45:04.09 3.0 negative manual Pg 5.27 0
IV.RIBO.EHZ.01 2021-12-18T14:45:03.15 3.0 undecidable manual Sg 2.92 0
IV.RCAV.EHZ. 2021-12-18T14:45:02.42 3.0 undecidable manual Sg 6.25 0
IV.RMP.HHZ. 2021-12-18T14:45:01.86 3.0 undecidable manual Sg 5.01 0
IV.TREG.EHZ. 2021-12-18T14:44:58.67 3.0 undecidable manual Pg 5.64 0
IX.SCL3.EHZ.02 2021-12-18T14:44:58.19 3.0 negative manual Pg 3.56 0
CR.STON.BHZ. 2021-12-18T14:44:56.16 3.0 positive manual Pn -5.23 0
IV.CRE.HHZ. 2021-12-18T14:44:52.01 3.0 undecidable manual Sn -2.03 0
IV.CDRU.HHZ. 2021-12-18T14:44:50.40 3.0 undecidable manual Pn -5.07 0
IV.PTRJ.HHZ. 2021-12-18T14:44:48.32 3.0 negative manual Pg 5.4 0
IV.PAOL.HHZ. 2021-12-18T14:44:41.12 3.0 undecidable manual Pn -5.13 0
IV.IMOL.HNZ. 2021-12-18T14:44:41.49 3.0 positive manual Pg 2.46 0
IV.MSSA.HHZ. 2021-12-18T14:44:40.82 3.0 positive manual Pn -9.99 0
OT.OT11.EHZ. 2021-12-18T14:44:40.73 3.0 negative manual Pn -5.74 0
IV.CSP1.EHZ. 2021-12-18T14:44:39.83 0.3 undecidable manual S 32 55.3002 91 0.2 68
IV.MML1.HNZ. 2021-12-18T14:44:38.58 0.3 undecidable manual S 11 50.5161 91 0.23 68
IV.FDMO.HHZ. 2021-12-18T14:44:37.08 0.6 undecidable manual S 25 45.3213 91 0.11 47
IV.ASSB.HHZ. 2021-12-18T14:44:36.66 0.3 undecidable manual S 340 44.3223 91 -0.05 71
IV.CESI.HNZ. 2021-12-18T14:44:35.16 0.3 undecidable manual S 7 37.7289 91 0.23 70
IV.FIU.EHZ. 2021-12-18T14:44:35.90 3.0 negative manual Pn -6.7 0
IV.NRCA.HHZ. 2021-12-18T14:44:32.16 0.3 undecidable manual S 50 28.4493 92 -0.31 70
IV.CSP1.EHZ. 2021-12-18T14:44:32.48 0.3 undecidable manual P 32 55.3002 91 0.13 69
IV.MML1.HNZ. 2021-12-18T14:44:31.53 0.3 undecidable manual P 11 50.5161 91 -0.08 70
IV.CESX.HHE. 2021-12-18T14:44:30.95 0.3 undecidable manual S 253 22.2555 93 0.13 73
IV.FDMO.HHZ. 2021-12-18T14:44:30.63 0.3 undecidable manual P 25 45.3213 91 -0.19 69
IV.ASSB.HHZ. 2021-12-18T14:44:30.59 0.1 undecidable manual P 340 44.3223 91 -0.08 95
IV.RIBO.EHZ.01 2021-12-18T14:44:29.13 3.0 undecidable manual P -7.28 0
IV.LNSS.HHZ. 2021-12-18T14:44:29.56 0.3 undecidable manual S 114 17.2716 96 0.07 74
IV.CESI.HNZ. 2021-12-18T14:44:29.57 0.6 undecidable manual P 7 37.7289 91 -0.07 48
IV.RM33.EHZ. 2021-12-18T14:44:28.86 0.3 undecidable manual P 120 34.743 91 -0.32 69
IV.NRCA.HHZ. 2021-12-18T14:44:28.08 0.3 undecidable manual P 50 28.4493 92 -0.14 72
IV.CESX.HHE. 2021-12-18T14:44:27.10 0.3 undecidable manual P 253 22.2555 93 -0.16 73
IT.GNU.HGE. 2021-12-18T14:44:27.93 0.3 undecidable manual P 304 27.2505 92 -0.09 73
IV.ARRO.EHZ. 2021-12-18T14:44:27.98 0.3 undecidable manual S 214 11.877 115 -0.11 75
IV.LNSS.HHZ. 2021-12-18T14:44:26.74 0.3 undecidable manual P 114 17.2716 96 0.24 72
IV.GAVE.EHZ. 2021-12-18T14:44:26.52 0.3 undecidable manual S 54 4.6953 151 -0.17 75
IV.GAVE.EHZ. 2021-12-18T14:44:25.02 0.1 undecidable manual P 54 4.6953 151 0.14 100
IV.ARRO.EHZ. 2021-12-18T14:44:25.96 0.3 undecidable manual P 214 11.877 115 0.27 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.1 0.0001365 1.82 AML other m 2021-12-18T14:44:28.08
IV.ARRO.EHE. ML:1.1 0.0001325224 0.6016 AML other m 2021-12-18T14:44:28.70
IV.LNSS.HHE. ML:1.4 0.000208 0.18 AML other m 2021-12-18T14:44:29.84
IV.LNSS.HHN. ML:1.4 0.0002275 0.42 AML other m 2021-12-18T14:44:30.21
IV.GAVE.EHN. ML:1.5 0.00054213645 0.3584 AML other m 2021-12-18T14:44:26.72
IV.GAVE.EHE. ML:1.5 0.00050066235 1.4592 AML other m 2021-12-18T14:44:26.90
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