Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 23-01-2020 and time 16:56:42 (UTC) in region 4 km SE Cerreto di Spoleto (PG)

A magnitude ML 0.9 earthquake occured in region: 4 km SE Cerreto di Spoleto (PG), on

  • 23-01-2020 16:56:42 (UTC)
  • 23-01-2020 17:56:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7990, 12.9540 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 4 1075 1075
Vallo di Nera PG 8 364 1439
Poggiodomo PG 10 117 1556
Cascia PG 10 3217 4773
Sellano PG 10 1079 5852
Preci PG 11 724 6576
Norcia PG 11 4957 11533
Sant'Anatolia di Narco PG 12 564 12097
Scheggino PG 14 461 12558
Campello sul Clitunno PG 15 2442 15000
Monteleone di Spoleto PG 16 599 15599
Visso MC 18 1107 16706
Spoleto PG 19 38218 54924
Trevi PG 19 8469 63393
Castelsantangelo sul Nera MC 20 281 63674

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Foligno (57155 inhabitants)
36 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
63 Km W of Teramo (54892 inhabitants)
81 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
Reviewed
Rev100 		ML 0.9 2020-01-23
16:56:42		 42.799 12.9545 11 2020-01-23
17:13:12		 Sala Sismica INGV-Roma 75773771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-23 16:56:42 ± 0.04
Latitude 42.7990 ± 0.0027
Longitude 12.9545 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 75773771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 318
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 133
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) 91
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31476
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 75773771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-23 17:13:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IMI.HHZ. 2020-01-23T16:58:18.08 3.0 undecidable manual Sn 0.2 0
IT.VNF1.HGZ. 2020-01-23T16:57:25.53 3.0 undecidable manual Sn -1.85 0
IV.BOZZ.HNZ. 2020-01-23T16:57:22.38 3.0 negative manual Pn 0.97 0
IT.VNF1.HGZ. 2020-01-23T16:57:09.13 3.0 positive manual Pg 2.76 0
IV.MCIV.CHZ. 2020-01-23T16:56:54.49 3.0 negative manual P -0.82 0
IV.MML1.HNZ. 2020-01-23T16:56:54.10 0.3 undecidable manual S 2 34.9428 50 0 74
IV.MOMA.HHZ. 2020-01-23T16:56:53.29 0.6 undecidable manual S 271 31.2465 50 0.16 48
IV.FDMO.HHZ. 2020-01-23T16:56:52.30 0.3 undecidable manual S 22 28.4493 50 -0.08 74
IV.MC2.EHZ. 2020-01-23T16:56:51.05 0.6 undecidable manual S 57 22.755 50 0.19 48
IV.LNSS.HHZ. 2020-01-23T16:56:50.73 0.6 undecidable manual S 162 22.8549 50 -0.15 49
IV.MML1.HNZ. 2020-01-23T16:56:49.00 0.3 undecidable manual P 2 34.9428 50 -0.1 72
IV.GAVE.EHZ. 2020-01-23T16:56:48.03 0.3 undecidable manual S 203 12.7761 130 -0.08 75
IV.MOMA.HHZ. 2020-01-23T16:56:48.48 0.3 undecidable manual P 271 31.2465 50 -0.06 73
IV.NRCA.HNZ. 2020-01-23T16:56:48.23 0.6 undecidable manual S 74 13.5753 129 -0.08 50
IV.FDMO.HHZ. 2020-01-23T16:56:48.00 0.3 undecidable manual P 22 28.4493 50 -0.11 73
IV.MC2.EHZ. 2020-01-23T16:56:47.44 0.6 undecidable manual P 57 22.755 50 0.21 48
IV.LNSS.HHZ. 2020-01-23T16:56:47.26 0.3 undecidable manual P 162 22.8549 50 0.02 75
IV.GAVE.EHZ. 2020-01-23T16:56:45.76 0.1 undecidable manual P 203 12.7761 130 0.12 100
IV.NRCA.HNZ. 2020-01-23T16:56:45.82 0.3 undecidable manual P 74 13.5753 129 0.06 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:0.8 0.0000664 0.34 AML other m 2020-01-23T16:56:48.15
IV.GAVE.EHE. ML:0.9 0.0000917 0.12 AML other m 2020-01-23T16:56:48.44
IV.LNSS.HHE. ML:0.7 0.00003665 0.88 AML other m 2020-01-23T16:56:50.40
IV.LNSS.HHN. ML:0.7 0.00003585 0.18 AML other m 2020-01-23T16:56:51.18
IV.GAVE.HNE. ML:1.0 0.00010164803999999999 0.1152 AML other m 2020-01-23T16:56:48.49
IV.GAVE.HNN. ML:1.1 0.00012784679999999998 0.8704 AML other m 2020-01-23T16:56:48.35
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