INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 20-01-2019 and time 23:58:14 (Italy) in region 3 km E Castel Ritaldi (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km E Castel Ritaldi (PG), on

  • 20-01-2019 22:58:14 (UTC)
  • 20-01-2019 23:58:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.84, 12.71 at 8 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castel Ritaldi PG 3 3278 3278
Trevi PG 6 8469 11747
Campello sul Clitunno PG 6 2442 14189
Montefalco PG 8 5679 19868
Giano dell'Umbria PG 11 3846 23714
Spoleto PG 12 38218 61932
Foligno PG 13 57155 119087
Bevagna PG 14 5081 124168
Vallo di Nera PG 15 364 124532
Gualdo Cattaneo PG 15 6155 130687
Sant'Anatolia di Narco PG 16 564 131251
Massa Martana PG 17 3770 135021
Scheggino PG 17 461 135482
Cerreto di Spoleto PG 17 1075 136557
Spello PG 18 8645 145202
Sellano PG 19 1079 146281

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km S of Foligno (57155 inhabitants)
31 Km N of Terni (111501 inhabitants)
40 Km SE of Perugia (166134 inhabitants)
68 Km NE of Viterbo (67173 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
84 Km W of Teramo (54892 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.1 2019-01-20
22:58:14
42.84 12.71 8 2019-01-20
23:03:59
Sala Sismica INGV-Roma 64828271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-01-20 22:58:14 ± 0.07
Latitude 42.84 ± 0.00
Longitude 12.71 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 64828271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 371
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 318
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.10792
Epicentral distance of station farthest from the epicenter (degree) 0.56927
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 21
Type of magnitude ML
Reference to an origin 64828271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-01-20 23:03:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2019-01-20T22:58:35.48 0.6 undecidable manual S 30 0.5693 50 0.62 39
IV.FDMO.HHZ. 2019-01-20T22:58:28.12 0.6 undecidable manual S 54 0.3408 50 0.02 48
IV.NRCA.HHZ. 2019-01-20T22:58:26.95 0.6 undecidable manual S 91 0.2968 104 0.27 46
IV.EL6.EHZ. 2019-01-20T22:58:26.25 1.0 positive manual P 30 0.5693 50 -0.18 22
IV.GAVE.EHZ. 2019-01-20T22:58:23.39 0.6 undecidable manual S 137 0.1988 110 0.33 46
IV.CESI.HHZ. 2019-01-20T22:58:23.83 0.6 undecidable manual S 40 0.2203 109 -0.02 49
IV.FDMO.HHZ. 2019-01-20T22:58:22.22 0.1 undecidable manual P 54 0.3408 50 -0.3 90
IV.ATCC.EHE. 2019-01-20T22:58:22.86 0.6 undecidable manual P 352 0.3516 50 0.16 46
IV.LNSS.HHZ. 2019-01-20T22:58:22.26 1.0 undecidable manual P 134 0.3372 50 -0.21 23
IV.NRCA.HHZ. 2019-01-20T22:58:21.40 0.1 undecidable manual P 91 0.2968 104 -0.31 91
IV.CESX.HHE. 2019-01-20T22:58:20.59 0.1 undecidable manual P 202 0.2455 107 -0.02 97
IV.CESI.HHZ. 2019-01-20T22:58:19.99 0.1 positive manual P 40 0.2203 109 -0.08 97
IV.MOMA.HHZ. 2019-01-20T22:58:19.91 0.1 undecidable manual S 252 0.1079 124 -0.03 100
IV.GAVE.EHZ. 2019-01-20T22:58:19.76 1.0 positive manual P 137 0.1988 110 0.14 24
IT.GNU.HGE. 2019-01-20T22:58:18.23 0.6 undecidable manual P 252 0.1079 124 0.42 46
IT.FOPC.HGN. 2019-01-20T22:58:18.36 0.6 undecidable manual P 358 0.1322 119 0.08 49
IV.MOMA.HHZ. 2019-01-20T22:58:17.70 0.1 undecidable manual P 252 0.1079 124 -0.1 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:1.2 0.00017499775 0.3328 AML other m 2019-01-20T22:58:20.11
IV.MOMA.HHN. ML:1.2 0.00018133015 0.1408 AML other m 2019-01-20T22:58:21.74
IV.MOMA.HHE. ML:1.3 0.0002403463 0.1536 AML other m 2019-01-20T22:58:20.83
IV.MOMA.HNE. ML:1.3 0.000224202665 0.1536 AML other m 2019-01-20T22:58:20.83
IV.GAVE.EHE. ML:1.1 8.740741E-5 0.128 AML other m 2019-01-20T22:58:25.86
IV.GAVE.HNE. ML:1.3 0.0001276476 0.3072 AML other m 2019-01-20T22:58:27.49
IV.GAVE.HNN. ML:1.4 0.00017412625 0.6784 AML other m 2019-01-20T22:58:21.11
IV.GAVE.EHN. ML:1.1 9.0626945E-5 0.1408 AML other m 2019-01-20T22:58:24.54
IV.CESI.HHN. ML:0.9 5.0133355E-5 0.1152 AML other m 2019-01-20T22:58:24.36
IV.CESI.HHE. ML:0.7 3.082947E-5 0.0768 AML other m 2019-01-20T22:58:24.47
IV.NRCA.HNN. ML:1.7 0.0002223144 0.8192 AML other m 2019-01-20T22:58:21.54
IV.NRCA.HHN. ML:1 4.6580575E-5 0.0768 AML other m 2019-01-20T22:58:28.52
IV.NRCA.HHE. ML:1 4.102348E-5 0.128 AML other m 2019-01-20T22:58:28.52
IV.FDMO.HHN. ML:0.8 2.325744E-5 0.1792 AML other m 2019-01-20T22:58:28.85
IV.FDMO.HHE. ML:0.7 1.84389845E-5 0.1408 AML other m 2019-01-20T22:58:30.02
IV.LNSS.HHN. ML:1.1 4.6943065E-5 0.1792 AML other m 2019-01-20T22:58:28.77
IV.LNSS.HNE. ML:1.4 0.000101157435 0.5504 AML other m 2019-01-20T22:58:27.19
IV.LNSS.HNN. ML:1.6 0.00014314025 0.7936 AML other m 2019-01-20T22:58:33.09
IV.LNSS.HHE. ML:1 3.912654E-5 0.256 AML other m 2019-01-20T22:58:30.21
IV.EL6.EHE. ML:1.3 3.7169265E-5 0.9216 AML other m 2019-01-20T22:58:34.20
IV.EL6.EHN. ML:1.2 2.814092E-5 1.1648 AML other m 2019-01-20T22:58:26.45
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download