Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 27-01-2023 and time 15:59:37 (UTC) in region 7 km NW Sellano (PG)

A magnitude ML 0.9 earthquake occured in region: 7 km NW Sellano (PG), on

  • 27-01-2023 15:59:37 (UTC)
  • 27-01-2023 16:59:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9340, 12.8680 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
Sellano PG 7 1079 1079
Trevi PG 12 8469 9548
Monte Cavallo MC 13 145 9693
Cerreto di Spoleto PG 13 1075 10768
Foligno PG 14 57155 67923
Campello sul Clitunno PG 15 2442 70365
Preci PG 15 724 71089
Valtopina PG 17 1398 72487
Serravalle di Chienti MC 17 1070 73557
Spello PG 17 8645 82202
Visso MC 18 1107 83309
Montefalco PG 18 5679 88988
Vallo di Nera PG 18 364 89352
Pieve Torina MC 19 1458 90810

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
45 Km NE of Terni (111501 inhabitants)
75 Km W of Teramo (54892 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
99 Km SE of Arezzo (99543 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 0.9 2023-01-27
15:59:37		 42.9342 12.8682 12 2024-03-01
17:18:04		 Bollettino Sismico Italiano INGV 116541341
Reviewed
Rev100 		ML 1.2 2023-01-27
15:59:37		 42.9323 12.8612 11 2023-01-27
16:43:27		 Sala Sismica INGV-Roma 113834361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-27 15:59:37 ± 0.13
Latitude 42.9342 ± 0.0054
Longitude 12.8682 ± 0.0098
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116541341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 677
Semi-minor axis of confidence ellipse (meter) 519
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 82
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 113834361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-27 16:43:27

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 116541341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-20 07:54:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHE. 2023-01-27T15:59:49.22 0.3 undecidable manual S 57 32.4453 91 0.15 71
IV.NRCA.HHZ. 2023-01-27T15:59:46.43 0.6 undecidable manual S 119 22.9548 93 -0.1 49
IV.ARRO.EHZ. 2023-01-27T15:59:46.29 1.0 undecidable manual P 192 40.2264 91 0.71 20
IV.FDMO.HHZ. 2023-01-27T15:59:45.95 0.3 undecidable manual S 57 21.0678 94 -0.1 73
IV.LNSS.HNZ. 2023-01-27T15:59:45.26 0.3 undecidable manual P 159 39.3273 91 -0.18 69
IV.CSP1.EHE. 2023-01-27T15:59:44.41 0.6 undecidable manual P 57 32.4453 91 0.04 49
IV.SNTG.HHZ. 2023-01-27T15:59:44.63 0.3 undecidable manual P 9 36.0417 91 -0.31 68
IT.MTCL.HGZ. 2023-01-27T15:59:43.68 0.1 undecidable manual S 58 12.5763 112 -0.13 99
IV.FDMO.HHZ. 2023-01-27T15:59:42.86 0.3 undecidable manual P 57 21.0678 94 0.23 72
IV.NRCA.HHZ. 2023-01-27T15:59:42.84 0.3 positive manual P 119 22.9548 93 -0.07 73
IV.CESI.HHZ. 2023-01-27T15:59:42.69 0.6 undecidable manual S 21 8.3805 131 -0.17 50
IT.MTCL.HGZ. 2023-01-27T15:59:41.50 0.1 undecidable manual P 58 12.5763 112 0.17 98
IV.CESI.HHZ. 2023-01-27T15:59:40.88 0.1 negative manual P 21 8.3805 131 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.0 0.000063450765 0.1536 AML other m 2023-01-27T15:59:46.60
IV.NRCA.HHE. ML:1.0 0.000052965219999999994 0.1152 AML other m 2023-01-27T15:59:47.46
IV.FDMO.HHN. ML:0.8 0.00004532983 1.7792 AML other m 2023-01-27T15:59:46.05
IV.FDMO.HHE. ML:0.7 0.000035479079999999996 0.3072 AML other m 2023-01-27T15:59:46.21
IV.SNTG.HHE. ML:1.0 0.000036978565 1.4464 AML other m 2023-01-27T16:00:00.53
IV.SNTG.HHN. ML:1.0 0.000038552175 1.2416 AML other m 2023-01-27T15:59:58.34
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