Earthquake with magnitude of ML 1.1 on date 20-04-2018 and time 16:31:42 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 7 km E Norcia (PG), on

  • 20-04-2018 14:31:42 (UTC)
  • 20-04-2018 16:31:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.82, 13.17 at 12 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
Norcia PG 7 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Arquata del Tronto AP 12 1178 6416
Preci PG 13 724 7140
Montegallo AP 14 523 7663
Visso MC 14 1107 8770
Ussita MC 14 444 9214
Accumoli RI 15 667 9881
Montemonaco AP 16 604 10485
Cascia PG 17 3217 13702
Montefortino FM 20 1178 14880

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
71 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
94 Km W of Pescara (121014 inhabitants)
97 Km NW of Chieti (51815 inhabitants)
98 Km E of Viterbo (67173 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km NE 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 2018-04-20
14:31:42
42.82 13.17 12 2018-04-20
14:37:24
Sala Sismica INGV-Roma 55873901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-20 14:31:42 ± 0.05
Latitude 42.82 ± 0.00
Longitude 13.17 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 55873901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 378
Semi-minor axis of confidence ellipse (meter) 111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 22
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
Epicentral distance of station farthest from the epicenter (degree) 0.32915
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 55873901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-04-20 14:37:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PE3.EHZ. 2018-04-20T14:32:14.00 3.0 undecidable manual S -3.36 0
IV.PE3.EHZ. 2018-04-20T14:32:02.38 3.0 negative manual P 0.25 0
IV.MML1.EHZ. 2018-04-20T14:31:55.16 0.1 undecidable manual S 334 0.3292 92 0.18 92
IV.T1220.EHZ. 2018-04-20T14:31:54.11 0.1 undecidable manual S 349 0.2986 92 0.05 95
IV.CSP1.EHZ. 2018-04-20T14:31:53.53 0.1 undecidable manual S 5 0.2752 92 0.15 93
IV.T1219.EHZ. 2018-04-20T14:31:52.98 0.1 undecidable manual S 333 0.2671 92 -0.15 94
IV.T1299.EHZ. 2018-04-20T14:31:51.38 0.1 undecidable manual S 156 0.2005 94 0.2 95
IV.SMA1.EHZ. 2018-04-20T14:31:51.65 0.1 undecidable manual S 147 0.223 94 -0.18 94
IV.FDMO.HHZ. 2018-04-20T14:31:51.72 0.1 undecidable manual S 345 0.2266 93 -0.23 93
IV.TERO.HHZ. 2018-04-20T14:31:50.32 3.0 positive manual P -0.24 0
IV.MMO1.EHZ. 2018-04-20T14:31:49.20 0.1 undecidable manual S 55 0.1412 103 -0.23 94
IV.T1220.EHZ. 2018-04-20T14:31:49.24 0.1 undecidable manual P 349 0.2986 92 -0.05 95
IV.MML1.EHZ. 2018-04-20T14:31:49.92 0.3 undecidable manual P 334 0.3292 92 0.11 70
IV.MF5.EHZ. 2018-04-20T14:31:48.25 3.0 negative manual P -0.5 0
IV.CSP1.EHZ. 2018-04-20T14:31:48.89 0.1 undecidable manual P 5 0.2752 92 0 97
IV.T1219.EHZ. 2018-04-20T14:31:48.71 0.1 undecidable manual P 333 0.2671 92 -0.04 96
IV.SMA1.EHZ. 2018-04-20T14:31:48.00 0.3 undecidable manual P 147 0.223 94 0.01 73
IV.CESI.HHZ. 2018-04-20T14:31:48.80 3.0 undecidable manual P -0.1 0
IV.T1221.EHZ. 2018-04-20T14:31:48.28 3.0 undecidable manual P -0.11 0
IV.MC2.EHZ. 2018-04-20T14:31:48.40 0.1 undecidable manual S 9 0.0953 123 0.24 95
IV.FDMO.HHZ. 2018-04-20T14:31:48.00 0.1 undecidable manual P 345 0.2266 93 -0.06 96
IV.T1299.EHZ. 2018-04-20T14:31:47.71 0.3 undecidable manual P 156 0.2005 94 0.09 72
IV.T1214.EHZ. 2018-04-20T14:31:47.40 0.1 undecidable manual S 154 0.0648 139 -0.08 98
IV.MTRA.EHZ. 2018-04-20T14:31:47.08 3.0 positive manual P 0.05 0
IV.NRCA.HHZ. 2018-04-20T14:31:46.84 0.1 undecidable manual S 292 0.0441 151 -0.28 95
IV.MMO1.EHZ. 2018-04-20T14:31:46.55 0.1 undecidable manual P 55 0.1412 103 -0.06 98
IV.T1214.EHZ. 2018-04-20T14:31:45.64 0.1 undecidable manual P 154 0.0648 139 0.16 98
IV.MC2.EHZ. 2018-04-20T14:31:45.99 0.1 undecidable manual P 9 0.0953 123 0.11 98
IV.NRCA.HHZ. 2018-04-20T14:31:45.33 0.1 undecidable manual P 292 0.0441 151 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.00083398545 0.1024 AML other m 2018-04-20T14:31:47.56
IV.NRCA.HNE. ML:1.7 0.00077614945 0.1088 AML other m 2018-04-20T14:31:47.57
IV.NRCA.HNN. ML:1.7 0.00079400655 0.1152 AML other m 2018-04-20T14:31:47.76
IV.NRCA.HHN. ML:1.8 0.0008522271 0.1216 AML other m 2018-04-20T14:31:47.75
IV.T1214.HNN. ML:1.2 0.00018612345 0.16 AML other m 2018-04-20T14:31:48.52
IV.T1214.EHE. ML:1.1 0.00016333484 0.1728 AML other m 2018-04-20T14:31:48.20
IV.T1214.HNE. ML:1.1 0.000168823895 0.1728 AML other m 2018-04-20T14:31:48.12
IV.T1214.EHN. ML:1.1 0.0001817738 0.16 AML other m 2018-04-20T14:31:48.52
IV.MTRA.EHE. ML:1.1 8.3355855E-5 0.224 AML other m 2018-04-20T14:31:50.86
IV.MTRA.EHN. ML:0.9 6.0500695E-5 0.1216 AML other m 2018-04-20T14:31:51.40
IV.T1299.HNE. ML:1.2 9.228439E-5 0.96 AML other m 2018-04-20T14:32:00.90
IV.T1299.HNN. ML:1.3 0.0001225548 0.6272 AML other m 2018-04-20T14:31:54.07
IV.T1299.EHN. ML:0.6 2.6591E-5 0.1216 AML other m 2018-04-20T14:31:51.55
IV.T1299.EHE. ML:0.5 2.0439175E-5 0.1152 AML other m 2018-04-20T14:31:51.57
IV.SMA1.EHE. ML:0.7 3.22372005E-5 0.0832 AML other m 2018-04-20T14:31:51.87
IV.SMA1.EHN. ML:0.8 3.422812E-5 0.0832 AML other m 2018-04-20T14:31:52.32
IV.FDMO.HHN. ML:0.8 3.9082585E-5 0.1792 AML other m 2018-04-20T14:31:52.55
IV.FDMO.HHE. ML:0.7 2.9167315E-5 0.16 AML other m 2018-04-20T14:31:52.04
IV.MF5.EHE. ML:0.8 3.088634E-5 0.4416 AML other m 2018-04-20T14:31:57.53
IV.MF5.EHN. ML:0.8 3.242486E-5 0.1984 AML other m 2018-04-20T14:31:54.78
IV.T1221.HNN. ML:1.3 0.00010056976 0.4928 AML other m 2018-04-20T14:31:54.21
IV.T1221.EHN. ML:1.1 6.93078E-5 1.696 AML other m 2018-04-20T14:32:01.87
IV.T1221.EHE. ML:0.4 1.345239E-5 0.0832 AML other m 2018-04-20T14:31:53.39
IV.T1221.HNE. ML:1.3 0.000115323285 0.96 AML other m 2018-04-20T14:32:00.85
IV.T1219.HNE. ML:0.8 3.0133295E-5 0.7232 AML other m 2018-04-20T14:31:52.60
IV.T1219.HNN. ML:1 5.195638885E-5 1.0112 AML other m 2018-04-20T14:31:51.92
IV.T1219.EHE. ML:1 4.8519825E-5 0.16 AML other m 2018-04-20T14:31:53.69
IV.T1219.EHN. ML:1.2 7.83029E-5 0.1408 AML other m 2018-04-20T14:31:53.36
IV.CESI.HHN. ML:1.2 7.0536145E-5 0.3584 AML other m 2018-04-20T14:31:53.75
IV.CESI.HHE. ML:0.8 3.075253E-5 0.1216 AML other m 2018-04-20T14:31:53.83
IV.CSP1.EHN. ML:0 6.058838E-6 0.1216 AML other m 2018-04-20T14:31:56.36
IV.CSP1.EHE. ML:0.7 2.25551E-5 0.3968 AML other m 2018-04-20T14:31:54.29
IV.T1220.EHN. ML:1.1 4.8113565E-5 0.224 AML other m 2018-04-20T14:31:55.95
IV.T1220.HNE. ML:1.1 5.267606E-5 0.544 AML other m 2018-04-20T14:32:00.02
IV.T1220.EHE. ML:1.2 6.6352535E-5 0.5248 AML other m 2018-04-20T14:32:03.80
IV.T1220.HNN. ML:1 4.359431E-5 0.256 AML other m 2018-04-20T14:31:55.95
IV.MML1.EHN. ML:0.7 2.219245E-5 0.2176 AML other m 2018-04-20T14:31:55.38
IV.MML1.EHE. ML:0.6 1.7392675E-5 0.16 AML other m 2018-04-20T14:31:55.69
IV.TERO.HHN. ML:1.2 5.570851E-5 0.0576 AML other m 2018-04-20T14:31:56.55
IV.TERO.HNE. ML:1.6 0.00012515715 1.3312 AML other m 2018-04-20T14:31:55.47
IV.TERO.HNN. ML:1.3 6.7149995E-5 0.9472 AML other m 2018-04-20T14:32:03.56
IV.TERO.HHE. ML:1 2.892241E-5 0.0768 AML other m 2018-04-20T14:31:56.71
IV.PE3.EHN. ML:2 8.258917E-5 0.0768 AML other m 2018-04-20T14:32:13.84
IV.PE3.EHE. ML:2 8.965494E-5 0.1024 AML other m 2018-04-20T14:32:16.60
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