Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-01-2020 and time 07:31:24 (UTC) in region 2 km N Montefalco (PG)

A magnitude ML 1.4 earthquake occured in region: 2 km N Montefalco (PG), on

  • 18-01-2020 07:31:24 (UTC)
  • 18-01-2020 08:31:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9160, 12.6600 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
Montefalco PG 2 5679 5679
Bevagna PG 5 5081 10760
Foligno PG 6 57155 67915
Trevi PG 8 8469 76384
Gualdo Cattaneo PG 8 6155 82539
Spello PG 9 8645 91184
Castel Ritaldi PG 10 3278 94462
Cannara PG 11 4305 98767
Giano dell'Umbria PG 11 3846 102613
Campello sul Clitunno PG 14 2442 105055
Assisi PG 18 28299 133354
Valtopina PG 18 1398 134752
Bettona PG 18 4367 139119
Collazzone PG 18 3473 142592
Massa Martana PG 19 3770 146362
Bastia Umbra PG 19 21874 168236

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km SW of Foligno (57155 inhabitants)
31 Km SE of Perugia (166134 inhabitants)
39 Km N of Terni (111501 inhabitants)
72 Km NE of Viterbo (67173 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
88 Km SE of Arezzo (99543 inhabitants)
90 Km W of Teramo (54892 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 2020-01-18
07:31:24		 42.9157 12.6598 10 2020-07-18
21:08:34		 Bollettino Sismico Italiano INGV 78446471
Reviewed
Rev100 		ML 1.4 2020-01-18
07:31:24		 42.9153 12.653 10 2020-01-18
07:38:18		 Sala Sismica INGV-Roma 75627521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-18 07:31:24 ± 0.06
Latitude 42.9157 ± 0.0036
Longitude 12.6598 ± 0.0049
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 78446471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 423
Semi-minor axis of confidence ellipse (meter) 340
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 124
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.45416
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 78446471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-21 16:49:01

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 75627521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-18 07:38:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATVA.EHE. 2020-01-18T07:31:39.87 0.6 undecidable manual S 323 50.4162 50 -0.57 41
IV.FDMO.HHZ. 2020-01-18T07:31:37.05 0.3 undecidable manual S 69 37.2294 50 0.14 70
IV.NRCA.HHZ. 2020-01-18T07:31:37.16 0.3 undecidable manual S 104 38.0286 50 0.02 71
IV.MURB.HHZ. 2020-01-18T07:31:37.94 0.3 undecidable manual S 344 40.0266 50 0.26 68
IV.GAVE.EHZ. 2020-01-18T07:31:35.41 0.3 undecidable manual S 142 31.2465 50 0.08 72
IV.ATCC.EHZ. 2020-01-18T07:31:34.74 0.3 undecidable manual S 357 29.9478 50 -0.24 69
IV.ATVA.EHE. 2020-01-18T07:31:33.31 0.3 undecidable manual P 323 50.4162 50 -0.28 66
IV.MGAB.HHZ. 2020-01-18T07:31:33.41 0.3 undecidable manual P 270 44.5221 50 0.73 58
IV.ATTE.HHN. 2020-01-18T07:31:32.57 0.3 undecidable manual P 322 39.9267 50 0.59 62
IV.CESI.HHZ. 2020-01-18T07:31:32.82 0.3 undecidable manual S 63 22.1556 114 0.18 71
IV.MURB.HHZ. 2020-01-18T07:31:31.98 0.3 undecidable manual P 344 40.0266 50 -0.01 71
IV.FDMO.HHZ. 2020-01-18T07:31:31.42 0.3 undecidable manual P 69 37.2294 50 -0.13 70
IV.NRCA.HHZ. 2020-01-18T07:31:31.57 0.1 undecidable manual P 104 38.0286 50 -0.11 94
IV.ATCC.EHZ. 2020-01-18T07:31:30.19 0.1 negative manual P 357 29.9478 50 -0.24 92
IV.MOMA.HHZ. 2020-01-18T07:31:30.16 0.3 undecidable manual S 211 14.3745 124 -0.09 73
IV.GAVE.EHZ. 2020-01-18T07:31:30.51 0.1 undecidable manual P 142 31.2465 50 -0.13 94
IT.GNU.HGE. 2020-01-18T07:31:30.25 0.6 undecidable manual S 210 14.3745 124 0 50
IV.CESI.HHZ. 2020-01-18T07:31:29.11 0.3 undecidable manual P 63 22.1556 114 0.03 73
IT.FOPC.HGN. 2020-01-18T07:31:28.32 0.6 undecidable manual S 30 6.993 144 -0.05 50
IT.GNU.HGE. 2020-01-18T07:31:27.70 0.1 undecidable manual P 210 14.3745 124 -0.01 100
IV.MOMA.HHZ. 2020-01-18T07:31:27.60 0.1 undecidable manual P 211 14.3745 124 -0.1 98
IT.FOPC.HGN. 2020-01-18T07:31:26.67 0.1 undecidable manual P 30 6.993 144 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:1.5 0.000348 0.42 AML other m 2020-01-18T07:31:30.85
IV.MOMA.HHN. ML:1.5 0.00029049999999999996 1.06 AML other m 2020-01-18T07:31:30.85
IV.MOMA.HNE. ML:1.6 0.0004055 0.12 AML other m 2020-01-18T07:31:30.88
IV.MOMA.HHE. ML:1.6 0.0004335 0.12 AML other m 2020-01-18T07:31:30.94
IV.ATCC.EHN. ML:1.3 0.0000981 0.62 AML other m 2020-01-18T07:31:35.12
IV.ATCC.EHE. ML:1.3 0.00009625000000000001 0.42 AML other m 2020-01-18T07:31:36.34
IV.GAVE.EHE. ML:1.2 0.00006305 0.98 AML other m 2020-01-18T07:31:37.11
IV.GAVE.EHN. ML:1.1 0.000055499999999999994 0.52 AML other m 2020-01-18T07:31:37.13
IV.NRCA.HHN. ML:1.4 0.00008649999999999999 1.16 AML other m 2020-01-18T07:31:37.99
IV.MURB.HHE. ML:1.4 0.00008885 1.06 AML other m 2020-01-18T07:31:38.22
IV.MURB.HHN. ML:1.4 0.00009490000000000002 1.1 AML other m 2020-01-18T07:31:38.41
IV.NRCA.HHE. ML:1.3 0.0000686 0.12 AML other m 2020-01-18T07:31:39.48
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