Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-12-2021 and time 14:15:47 (UTC) in region 5 km E Cerreto di Spoleto (PG)

A magnitude ML 1.5 earthquake occured in region: 5 km E Cerreto di Spoleto (PG), on

  • 18-12-2021 14:15:47 (UTC)
  • 18-12-2021 15:15:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8030, 12.9680 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 5 1075 1075
Vallo di Nera PG 9 364 1439
Cascia PG 10 3217 4656
Sellano PG 10 1079 5735
Norcia PG 10 4957 10692
Preci PG 10 724 11416
Poggiodomo PG 10 117 11533
Sant'Anatolia di Narco PG 13 564 12097
Scheggino PG 15 461 12558
Campello sul Clitunno PG 16 2442 15000
Monteleone di Spoleto PG 17 599 15599
Visso MC 17 1107 16706
Castelsantangelo sul Nera MC 18 281 16987
Trevi PG 20 8469 25456

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of Foligno (57155 inhabitants)
38 Km NE of Terni (111501 inhabitants)
58 Km SE of Perugia (166134 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
62 Km W of Teramo (54892 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
91 Km N of Guidonia Montecelio (88673 inhabitants)
94 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 1.5 2021-12-18
14:15:47		 42.8028 12.9682 10 2022-03-30
13:04:23		 Bollettino Sismico Italiano INGV 98822611
Reviewed
Rev100 		ML 1.5 2021-12-18
14:15:48		 42.8043 12.9813 10 2021-12-18
14:21:25		 Sala Sismica INGV-Roma 98679641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-18 14:15:47 ± 0.04
Latitude 42.8028 ± 0.0018
Longitude 12.9682 ± 0.0037
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 98822611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 291
Semi-minor axis of confidence ellipse (meter) 67
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.53510
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98822611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-22 14:49:49

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98679641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-18 14:21:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-12-18T14:16:06.79 0.3 undecidable manual S 10 59.3961 50 0.21 67
IV.MML1.EHZ. 2021-12-18T14:16:00.05 0.3 undecidable manual S 0 34.4433 50 0.13 71
IV.ASSB.HHN. 2021-12-18T14:16:00.56 0.3 undecidable manual S 317 36.6411 50 0.07 72
IV.CSP1.EHZ. 2021-12-18T14:16:00.70 0.3 undecidable manual S 31 37.4292 50 0 73
IV.RM33.HNE. 2021-12-18T14:16:00.96 0.3 undecidable manual S 148 38.3283 50 0.02 73
IV.SMA1.EHN. 2021-12-18T14:16:00.58 0.3 undecidable manual S 122 35.5422 50 0.38 68
IV.CESX.HHE. 2021-12-18T14:16:00.63 0.3 undecidable manual S 235 37.8288 50 -0.19 70
IV.MTRA.EHE. 2021-12-18T14:16:00.43 0.3 undecidable manual S 98 35.2425 50 0.3 69
IV.ARRO.EHZ. 2021-12-18T14:15:58.42 0.3 undecidable manual S 214 29.748 50 -0.25 70
IV.EL6.EHZ. 2021-12-18T14:15:58.62 0.3 undecidable manual P 10 59.3961 50 -0.1 69
IV.FDMO.HHZ. 2021-12-18T14:15:57.79 0.3 undecidable manual S 20 27.6501 50 -0.32 69
IT.MTCL.HGZ. 2021-12-18T14:15:56.00 0.6 undecidable manual S 7 21.3675 115 -0.15 49
IV.LNSS.HHZ. 2021-12-18T14:15:56.17 0.3 undecidable manual S 165 22.9548 113 -0.48 68
IV.MC2.EHZ. 2021-12-18T14:15:56.15 0.3 undecidable manual S 56 21.6672 114 -0.09 74
IV.CESI.HHZ. 2021-12-18T14:15:56.64 0.3 undecidable manual S 347 22.9548 113 -0.03 74
IV.CESX.HHE. 2021-12-18T14:15:55.56 0.3 undecidable manual P 235 37.8288 50 0.16 70
IV.ASSB.HHN. 2021-12-18T14:15:55.28 0.3 undecidable manual P 317 36.6411 50 0.08 72
IV.CSP1.EHZ. 2021-12-18T14:15:55.13 0.3 undecidable manual P 31 37.4292 50 -0.2 70
IV.RM33.HNE. 2021-12-18T14:15:55.41 0.3 undecidable manual P 148 38.3283 50 -0.06 72
IV.FEMA.HNZ. 2021-12-18T14:15:55.60 0.6 undecidable manual S 21 18.87 118 0.23 48
IV.SMA1.EHN. 2021-12-18T14:15:55.15 0.3 undecidable manual P 122 35.5422 50 0.11 72
IV.GAVE.EHZ. 2021-12-18T14:15:54.00 0.3 undecidable manual S 206 13.6752 126 0.17 73
IV.MTRA.EHE. 2021-12-18T14:15:54.87 0.3 undecidable manual P 98 35.2425 50 -0.13 71
IV.MML1.EHZ. 2021-12-18T14:15:54.84 0.3 undecidable manual P 0 34.4433 50 -0.04 73
IV.ARRO.EHZ. 2021-12-18T14:15:54.06 0.3 undecidable manual P 214 29.748 50 -0.1 72
IV.FDMO.HHZ. 2021-12-18T14:15:53.73 0.1 positive manual P 20 27.6501 50 -0.1 97
IV.NRCA.HHZ. 2021-12-18T14:15:53.44 0.3 undecidable manual S 74 12.3765 128 -0.03 76
IV.CESI.HHZ. 2021-12-18T14:15:53.10 0.1 positive manual P 347 22.9548 113 0.1 98
IV.FEMA.HNZ. 2021-12-18T14:15:52.32 0.1 undecidable manual P 21 18.87 118 0.07 99
IT.MTCL.HGZ. 2021-12-18T14:15:52.70 0.1 undecidable manual P 7 21.3675 115 0 100
IV.LNSS.HHZ. 2021-12-18T14:15:52.96 0.1 positive manual P 165 22.9548 113 -0.03 99
IV.MC2.EHZ. 2021-12-18T14:15:52.37 0.1 undecidable manual P 56 21.6672 114 -0.38 92
IV.NRCA.HHZ. 2021-12-18T14:15:51.33 0.1 undecidable manual P 74 12.3765 128 0.17 98
IV.GAVE.EHZ. 2021-12-18T14:15:51.74 0.1 positive manual P 206 13.6752 126 0.38 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.8 0.0007125 0.08 AML other m 2021-12-18T14:15:53.55
IV.NRCA.HHE. ML:1.6 0.000518 0.08 AML other m 2021-12-18T14:15:53.68
IV.GAVE.EHN. ML:1.7 0.0005465 0.3 AML other m 2021-12-18T14:15:54.35
IV.GAVE.EHE. ML:1.7 0.000501 0.58 AML other m 2021-12-18T14:15:54.59
IV.CESI.HHN. ML:1.4 0.00017199999999999998 0.78 AML other m 2021-12-18T14:15:56.92
IV.LNSS.HHN. ML:1.5 0.000186 0.22 AML other m 2021-12-18T14:15:56.94
IV.LNSS.HHE. ML:1.5 0.00019600000000000002 1.78 AML other m 2021-12-18T14:15:57.92
IV.FDMO.HHN. ML:1.1 0.00006855 0.44 AML other m 2021-12-18T14:15:57.00
IV.CESI.HHE. ML:1.1 0.0000804 0.34 AML other m 2021-12-18T14:15:57.55
IV.FDMO.HHE. ML:1.2 0.0000854 0.18 AML other m 2021-12-18T14:15:58.19
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