Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 18-12-2019 and time 19:21:27 (UTC) in region 2 km E Vallo di Nera (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km E Vallo di Nera (PG), on

  • 18-12-2019 19:21:27 (UTC)
  • 18-12-2019 20:21:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7760, 12.8880 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
Vallo di Nera PG 2 364 364
Cerreto di Spoleto PG 6 1075 1439
Sant'Anatolia di Narco PG 6 564 2003
Poggiodomo PG 8 117 2120
Scheggino PG 8 461 2581
Campello sul Clitunno PG 10 2442 5023
Cascia PG 12 3217 8240
Spoleto PG 13 38218 46458
Sellano PG 13 1079 47537
Monteleone di Spoleto PG 15 599 48136
Trevi PG 16 8469 56605
Norcia PG 17 4957 61562
Preci PG 17 724 62286
Castel Ritaldi PG 18 3278 65564
Ferentillo TR 19 1913 67477

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SE of Foligno (57155 inhabitants)
31 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
68 Km W of Teramo (54892 inhabitants)
75 Km NE of Viterbo (67173 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
91 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 1.0 2019-12-18
19:21:27		 42.7755 12.8878 11 2019-12-18
19:30:29		 Sala Sismica INGV-Roma 74771831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-18 19:21:27 ± 0.03
Latitude 42.7755 ± 0.0018
Longitude 12.8878 ± 0.0025
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 74771831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 210
Semi-minor axis of confidence ellipse (meter) 160
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 210.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34444
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 74771831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-18 19:30:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MODR.HHZ. 2019-12-18T19:22:22.96 3.0 undecidable manual Sg 4.05 0
IV.BRSN.HNZ. 2019-12-18T19:22:15.39 3.0 undecidable manual Sn 0.07 0
IV.FRON.EHZ. 2019-12-18T19:21:49.96 3.0 undecidable manual S -4.05 0
IV.COR1.EHZ. 2019-12-18T19:21:43.28 3.0 undecidable manual P -0.33 0
IV.MMO1.EHZ. 2019-12-18T19:21:40.32 0.1 undecidable manual S 69 38.2284 90 0.23 90
IV.ASSB.HHZ. 2019-12-18T19:21:39.02 0.3 undecidable manual S 328 35.0427 90 -0.2 69
IV.CESI.HHZ. 2019-12-18T19:21:36.74 0.1 undecidable manual S 3 25.4523 90 0.06 95
IV.MOMA.HHZ. 2019-12-18T19:21:36.72 0.3 undecidable manual S 277 26.0517 90 -0.12 71
IV.ARRO.EHZ. 2019-12-18T19:21:36.21 0.3 undecidable manual S 205 23.9538 90 -0.06 72
IV.LNSS.HHZ. 2019-12-18T19:21:35.88 0.3 undecidable manual S 147 22.8549 90 -0.09 71
IV.ASSB.HHZ. 2019-12-18T19:21:34.02 0.1 undecidable manual P 328 35.0427 90 -0.21 92
IV.MMO1.EHZ. 2019-12-18T19:21:34.73 0.1 undecidable manual P 69 38.2284 90 -0.01 95
IV.NRCA.HHZ. 2019-12-18T19:21:34.92 0.1 undecidable manual S 71 19.5693 90 -0.17 95
IV.CESX.HHZ. 2019-12-18T19:21:33.45 0.6 undecidable manual P 233 30.747 90 -0.13 47
IV.MC2.EHZ. 2019-12-18T19:21:33.42 0.1 undecidable manual P 58 28.749 90 0.15 94
IV.LNSS.HHZ. 2019-12-18T19:21:32.36 0.1 undecidable manual P 147 22.8549 90 0 97
IV.ARRO.EHZ. 2019-12-18T19:21:32.53 0.3 undecidable manual P 205 23.9538 90 0 73
IV.GAVE.EHZ. 2019-12-18T19:21:32.48 0.1 undecidable manual S 177 9.2796 124 0.04 100
IV.CESI.HHZ. 2019-12-18T19:21:32.83 0.1 undecidable manual P 3 25.4523 90 0.06 96
IV.MOMA.HHZ. 2019-12-18T19:21:32.86 0.1 undecidable manual P 277 26.0517 90 0 97
IV.NRCA.HHZ. 2019-12-18T19:21:31.81 0.1 positive manual P 71 19.5693 90 -0.04 98
IV.GAVE.EHZ. 2019-12-18T19:21:30.50 0.1 positive manual P 177 9.2796 124 0.18 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.6 0.0004655 0.12 AML other m 2019-12-18T19:21:32.58
IV.GAVE.EHN. ML:1.5 0.0003635 0.14 AML other m 2019-12-18T19:21:32.61
IV.LNSS.HHE. ML:0.9 0.000055150000000000006 0.38 AML other m 2019-12-18T19:21:36.67
IV.LNSS.HHN. ML:1.0 0.0000588 1.36 AML other m 2019-12-18T19:21:37.16
IV.GAVE.HNN. ML:1.0 0.00011624303 0.1408 AML other m 2019-12-18T19:21:32.68
IV.NRCA.HHE. ML:0.9 0.0000555552515 0.1536 AML other m 2019-12-18T19:21:36.40
IV.NRCA.HHN. ML:0.9 0.000057474159999999997 0.0768 AML other m 2019-12-18T19:21:35.63
IV.NRCA.HNE. ML:0.9 0.00006066163 0.3584 AML other m 2019-12-18T19:21:35.03
IV.NRCA.HNN. ML:1.0 0.000070430715 0.3328 AML other m 2019-12-18T19:21:35.22
IV.LNSS.HNE. ML:0.9 0.00005308514 0.704 AML other m 2019-12-18T19:21:36.22
IV.LNSS.HNN. ML:1.0 0.000059276665 0.5632 AML other m 2019-12-18T19:21:36.25
IV.CESI.HHE. ML:0.8 0.00004074921500000001 0.1152 AML other m 2019-12-18T19:21:37.22
IV.CESI.HHN. ML:1.1 0.00006747487 0.0768 AML other m 2019-12-18T19:21:37.00
IV.CESI.HNE. ML:0.8 0.0000361932805 0.2944 AML other m 2019-12-18T19:21:36.93
IV.CESI.HNN. ML:1.1 0.00006846901 0.2176 AML other m 2019-12-18T19:21:36.91
IV.MOMA.HHE. ML:1.0 0.00006017225 0.1792 AML other m 2019-12-18T19:21:37.17
IV.MOMA.HHN. ML:0.6 0.0000219308755 0.0896 AML other m 2019-12-18T19:21:37.33
IV.MOMA.HNE. ML:1.1 0.00007680587000000001 0.2176 AML other m 2019-12-18T19:21:37.17
IV.MOMA.HNN. ML:1.0 0.000056446995 0.5888 AML other m 2019-12-18T19:21:36.88
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