Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 27-09-2022 and time 22:56:33 (Italy) in region 6 km N Terni (TR)

A magnitude ML 1.3 earthquake occured in region: 6 km N Terni (TR), on

  • 27-09-2022 20:56:33 (UTC)
  • 27-09-2022 22:56:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6150, 12.6270 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
Terni TR 6 111501 111501
San Gemini TR 7 5018 116519
Acquasparta TR 11 4778 121297
Montefranco TR 12 1276 122573
Montecastrilli TR 12 5022 127595
Arrone TR 12 2763 130358
Stroncone TR 13 4917 135275
Ferentillo TR 13 1913 137188
Narni TR 14 19785 156973
Spoleto PG 16 38218 195191
Avigliano Umbro TR 17 2558 197749
Labro RI 17 374 198123
Colli sul Velino RI 18 533 198656
Polino TR 18 233 198889
Amelia TR 19 11897 210786
Morro Reatino RI 20 373 211159
Massa Martana PG 20 3770 214929

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km N of Terni (111501 inhabitants)
39 Km S of Foligno (57155 inhabitants)
48 Km E of Viterbo (67173 inhabitants)
58 Km SE of Perugia (166134 inhabitants)
69 Km N of Guidonia Montecelio (88673 inhabitants)
70 Km W of L'Aquila (69753 inhabitants)
74 Km N of Tivoli (56533 inhabitants)
81 Km N of Roma (2864731 inhabitants)
88 Km W of Teramo (54892 inhabitants)
90 Km NE of Civitavecchia (52991 inhabitants)
99 Km NE of Fiumicino (78395 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 1.3 2022-09-27
20:56:33		 42.6148 12.6273 12 2024-03-01
15:27:57		 Bollettino Sismico Italiano INGV 110977811
Reviewed
Rev100 		ML 1.3 2022-09-27
20:56:33		 42.6307 12.6358 11 2022-09-27
21:01:14		 Sala Sismica INGV-Roma 110230011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-27 20:56:33 ± 0.11
Latitude 42.6148 ± 0.0054
Longitude 12.6273 ± 0.0073
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 110977811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 554
Semi-minor axis of confidence ellipse (meter) 391
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.63762
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 110230011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-27 21:01:14

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 110977811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-20 16:48:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.EHZ. 2022-09-27T20:56:53.33 0.6 undecidable manual S 27 61.9935 91 0.63 39
IV.FDMO.HHZ. 2022-09-27T20:56:52.53 0.6 undecidable manual S 38 59.8956 91 0.4 42
IV.FIAM.HHZ. 2022-09-27T20:56:51.02 0.6 undecidable manual S 134 55.5999 91 0.05 45
IV.MC2.EHZ. 2022-09-27T20:56:51.80 0.6 undecidable manual S 54 56.2992 91 0.61 40
IV.MGAB.HHE. 2022-09-27T20:56:50.72 0.6 undecidable manual S 308 53.4021 91 0.32 43
IV.CESI.HHZ. 2022-09-27T20:56:49.38 0.3 undecidable manual S 27 48.8178 91 0.21 67
IV.NRCA.HHZ. 2022-09-27T20:56:48.47 0.3 undecidable manual S 58 46.5201 91 -0.09 68
IV.CSP1.EHZ. 2022-09-27T20:56:45.88 0.6 undecidable manual P 41 70.7736 91 -0.13 43
IV.LNSS.HHZ. 2022-09-27T20:56:44.98 0.6 undecidable manual S 92 33.744 92 -0.18 46
IV.FDMO.HHZ. 2022-09-27T20:56:44.00 0.1 undecidable manual P 38 59.8956 91 -0.34 85
IV.SMA1.EHZ. 2022-09-27T20:56:44.74 0.3 undecidable manual P 88 57.7977 91 0.73 56
IV.MML1.EHZ. 2022-09-27T20:56:44.27 0.3 undecidable manual P 27 61.9935 91 -0.39 63
IV.MGAB.HHE. 2022-09-27T20:56:43.66 0.1 undecidable manual P 308 53.4021 91 0.32 86
IV.FIAM.HHZ. 2022-09-27T20:56:43.44 0.3 undecidable manual P 134 55.5999 91 -0.23 66
IV.MC2.EHZ. 2022-09-27T20:56:43.92 0.3 undecidable manual P 54 56.2992 91 0.13 67
IV.ASSB.HHZ. 2022-09-27T20:56:42.08 0.3 undecidable manual P 3 47.5191 91 -0.35 65
IV.CESI.HHZ. 2022-09-27T20:56:42.31 0.1 undecidable manual P 27 48.8178 91 -0.32 87
IV.GAVE.EHZ. 2022-09-27T20:56:42.39 0.3 undecidable manual S 68 23.3544 94 -0.01 73
IV.RM33.EHZ. 2022-09-27T20:56:42.84 0.3 undecidable manual P 104 49.4172 91 0.13 68
IV.NRCA.HHZ. 2022-09-27T20:56:41.94 0.1 undecidable manual P 58 46.5201 91 -0.34 87
IT.GNU.HGN. 2022-09-27T20:56:41.68 0.6 undecidable manual S 347 21.4674 95 -0.21 47
IV.LNSS.HHZ. 2022-09-27T20:56:40.20 0.1 undecidable manual P 92 33.744 92 -0.1 94
IV.ARRO.EHZ. 2022-09-27T20:56:39.53 0.3 undecidable manual S 109 11.9769 116 0.11 72
IV.GAVE.EHZ. 2022-09-27T20:56:38.69 0.1 undecidable manual P 68 23.3544 94 -0.03 97
IT.GNU.HGN. 2022-09-27T20:56:38.30 0.3 undecidable manual P 347 21.4674 95 -0.12 71
IV.ARRO.EHZ. 2022-09-27T20:56:37.09 0.1 undecidable manual P 109 11.9769 116 0.1 97
IV.CESX.HHZ. 2022-09-27T20:56:37.81 0.6 undecidable manual S 258 3.3966 159 -0.07 50
IV.CESX.HHZ. 2022-09-27T20:56:36.08 0.1 undecidable manual P 258 3.3966 159 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.2 0.000265 0.78 AML other m 2022-09-27T20:56:38.46
IV.CESX.HHE. ML:1.2 0.00022399999999999997 1.08 AML other m 2022-09-27T20:56:38.14
IV.ARRO.EHN. ML:1.5 0.000325 0.18 AML other m 2022-09-27T20:56:39.84
IV.ARRO.EHE. ML:1.4 0.000258 0.16 AML other m 2022-09-27T20:56:40.35
IV.GAVE.EHE. ML:1.2 0.00010045 1.34 AML other m 2022-09-27T20:56:44.02
IV.GAVE.EHN. ML:1.2 0.00009405 0.84 AML other m 2022-09-27T20:56:44.22
IV.LNSS.HHE. ML:1.4 0.00010899999999999999 0.8 AML other m 2022-09-27T20:56:46.93
IV.LNSS.HHN. ML:1.3 0.00009125 1.46 AML other m 2022-09-27T20:56:46.17
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