INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 20-09-2018 and time 12:17:47 (Italy) in region 2 km E Valfabbrica (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km E Valfabbrica (PG), on

  • 20-09-2018 10:17:47 (UTC)
  • 20-09-2018 12:17:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.16, 12.63 at 10 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
Valfabbrica PG 2 3389 3389
Assisi PG 10 28299 31688
Bastia Umbra PG 12 21874 53562
Nocera Umbra PG 15 5839 59401
Gualdo Tadino PG 15 15208 74609
Valtopina PG 16 1398 76007
Fossato di Vico PG 18 2840 78847
Cannara PG 19 4305 83152
Spello PG 19 8645 91797

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Perugia (166134 inhabitants)
24 Km N of Foligno (57155 inhabitants)
67 Km N of Terni (111501 inhabitants)
69 Km E of Arezzo (99543 inhabitants)
82 Km SW of Fano (60888 inhabitants)
86 Km S of Pesaro (94582 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
100 Km S of Rimini (147750 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 2018-09-20
10:17:47
43.16 12.63 10 2018-09-20
10:27:23
Sala Sismica INGV-Roma 61147101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-20 10:17:47 ± 0.04
Latitude 43.16 ± 0.00
Longitude 12.63 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61147101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 285
Semi-minor axis of confidence ellipse (meter) 182
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 28
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.12231
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 61147101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-20 10:27:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2018-09-20T10:18:05.42 0.6 undecidable manual S 289 0.509 50 0.25 44
IV.MGAB.HHZ. 2018-09-20T10:18:03.68 0.6 undecidable manual S 237 0.4515 50 0.21 45
IV.PIEI.HHZ. 2018-09-20T10:18:01.06 0.6 undecidable manual S 350 0.3786 50 -0.25 45
IV.EL6.EHZ. 2018-09-20T10:18:01.85 0.6 undecidable manual S 64 0.3831 50 0.4 44
IV.MOMA.HHZ. 2018-09-20T10:18:00.66 0.6 undecidable manual S 187 0.3606 50 -0.12 47
IV.FDMO.HHZ. 2018-09-20T10:18:00.72 0.6 undecidable manual S 110 0.3588 50 0 48
IV.MML1.HNZ. 2018-09-20T10:17:57.58 0.3 undecidable manual S 101 0.2563 50 -0.1 72
IV.ATVO.HHZ. 2018-09-20T10:17:57.75 0.6 undecidable manual S 324 0.2716 50 -0.39 45
IV.SNTG.HNZ. 2018-09-20T10:17:57.31 0.6 undecidable manual S 68 0.2464 50 -0.08 48
IV.CAFI.HHZ. 2018-09-20T10:17:57.91 0.3 undecidable manual P 289 0.509 50 0.28 66
IV.CESI.HHZ. 2018-09-20T10:17:57.70 0.6 undecidable manual S 128 0.2563 50 0 49
IV.EL6.EHZ. 2018-09-20T10:17:56.01 0.6 undecidable manual P 64 0.3831 50 0.52 42
IV.MGAB.HHZ. 2018-09-20T10:17:56.93 0.1 undecidable manual P 237 0.4515 50 0.28 89
IV.ATFO.HHZ. 2018-09-20T10:17:56.19 0.6 undecidable manual S 349 0.2077 113 0.16 48
IV.PIEI.HHZ. 2018-09-20T10:17:55.27 0.3 undecidable manual P 350 0.3786 50 -0.14 69
IV.ATTE.HHZ. 2018-09-20T10:17:55.49 0.6 undecidable manual S 280 0.2023 114 -0.36 46
IV.FDMO.HHZ. 2018-09-20T10:17:55.17 0.3 undecidable manual P 110 0.3588 50 0.11 70
IV.FOSV.EHZ. 2018-09-20T10:17:54.59 0.6 undecidable manual S 36 0.1646 118 0.07 49
IV.MOMA.HHZ. 2018-09-20T10:17:54.89 0.6 undecidable manual P 187 0.3606 50 -0.21 46
IV.ATVO.HHZ. 2018-09-20T10:17:53.18 0.6 undecidable manual P 324 0.2716 50 -0.4 45
IV.SNTG.HNZ. 2018-09-20T10:17:53.02 0.3 undecidable manual P 68 0.2464 50 -0.12 72
IV.CESI.HHZ. 2018-09-20T10:17:53.25 0.3 undecidable manual P 128 0.2563 50 -0.07 72
IV.MML1.HNZ. 2018-09-20T10:17:53.18 0.1 undecidable manual P 101 0.2563 50 -0.13 95
IV.ASSB.HHZ. 2018-09-20T10:17:53.03 0.6 undecidable manual S 169 0.1223 126 -0.12 49
IV.MURB.HHZ. 2018-09-20T10:17:53.36 0.6 undecidable manual S 323 0.125 125 0.12 49
IV.ATFO.HHZ. 2018-09-20T10:17:52.31 0.6 undecidable manual P 349 0.2077 113 -0.05 49
IV.ATTE.HHZ. 2018-09-20T10:17:52.31 0.6 undecidable manual P 280 0.2023 114 0.06 49
IV.FOSV.EHZ. 2018-09-20T10:17:51.50 1.0 positive manual P 36 0.1646 118 0.01 25
IV.ASSB.HHZ. 2018-09-20T10:17:50.69 0.1 negative manual P 169 0.1223 126 0 100
IV.MURB.HHZ. 2018-09-20T10:17:50.78 0.1 undecidable manual P 323 0.125 125 0.04 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.3 0.000219 0.08 AML other m 2018-09-20T10:17:53.11
IV.ASSB.HHN. ML:1.4 0.000244 0.12 AML other m 2018-09-20T10:17:53.43
IV.MURB.HNN. ML:1.7 0.000475 0.3 AML other m 2018-09-20T10:17:53.63
IV.MURB.HHN. ML:1.7 0.0005465 0.26 AML other m 2018-09-20T10:17:53.64
IV.MURB.HHE. ML:1.8 0.000711 0.24 AML other m 2018-09-20T10:17:54.34
IV.MURB.HNE. ML:1.8 0.0006655 0.18 AML other m 2018-09-20T10:17:54.36
IV.FOSV.EHN. ML:1.2 0.00011565 0.3 AML other m 2018-09-20T10:17:54.81
IV.FOSV.EHE. ML:1.2 0.0001211 0.18 AML other m 2018-09-20T10:17:54.87
IV.ATTE.HHN. ML:0.8 4.305E-5 0.2 AML other m 2018-09-20T10:17:55.65
IV.ATTE.HHE. ML:0.8 4.74E-5 1.24 AML other m 2018-09-20T10:17:55.20
IV.CESI.HHE. ML:1 5.095E-5 1.84 AML other m 2018-09-20T10:17:57.96
IV.CESI.HHN. ML:0.9 4.555E-5 1.76 AML other m 2018-09-20T10:17:59.07
IV.FDMO.HHE. ML:1.1 4.3E-5 1.18 AML other m 2018-09-20T10:18:01.99
IV.FDMO.HHN. ML:1.1 4.005E-5 0.54 AML other m 2018-09-20T10:18:01.31
IV.MOMA.HHE. ML:0.9 2.8E-5 0.46 AML other m 2018-09-20T10:18:01.82
IV.MOMA.HHN. ML:0.9 2.975E-5 1.18 AML other m 2018-09-20T10:18:03.28
IV.MGAB.HHN. ML:1.2 3.985E-5 1.26 AML other m 2018-09-20T10:18:05.67
IV.MGAB.HHE. ML:1.2 3.79E-5 0.38 AML other m 2018-09-20T10:18:06.04
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