Earthquake with magnitude of ML 1.1 on date 04-07-2020 and time 16:18:06 (UTC) in region 2 km SE Norcia (PG)

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

  • 04-07-2020 16:18:06 (UTC)
  • 04-07-2020 18:18:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.1 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
Norcia PG 2 4957 4957
Cascia PG 10 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 14 281 9179
Accumoli RI 15 667 9846
Arquata del Tronto AP 16 1178 11024
Poggiodomo PG 16 117 11141
Cerreto di Spoleto PG 16 1075 12216
Visso MC 17 1107 13323
Cittareale RI 18 482 13805
Ussita MC 19 444 14249
Monteleone di Spoleto PG 19 599 14848
Sellano PG 19 1079 15927
Vallo di Nera PG 20 364 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 inhabitants)
99 Km W of Chieti (51815 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
Reviewed
Rev100
ML 1.1 2020-07-04
16:18:06
42.78 13.11 10 2020-07-04
16:24:25
Sala Sismica INGV-Roma 80777971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-04 16:18:06 ± 0.06
Latitude 42.78 ± 0.00
Longitude 13.11 ± 0.01
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 80777971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 628
Semi-minor axis of confidence ellipse (meter) 88
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 38
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
Epicentral distance of station farthest from the epicenter (degree) 0.32106
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 80777971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-04 16:24:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2020-07-04T16:19:34.10 3.0 undecidable manual Sg 16.950001 0
IV.EUCT.HNZ. 2020-07-04T16:19:31.55 3.0 undecidable manual Sg 13.88 0
IV.FREG.EHZ. 2020-07-04T16:19:22.58 3.0 undecidable manual Sg 6.07 0
AC.VLO.HHZ. 2020-07-04T16:19:18.04 3.0 positive manual Pn -4.61 0
IV.SALB.HHZ. 2020-07-04T16:19:10.53 3.0 negative manual Pg 10.18 0
ST.ZIAN.EHZ. 2020-07-04T16:18:57.18 3.0 undecidable manual Pg 12.32 0
IV.ROSPO.HHZ. 2020-07-04T16:18:55.93 3.0 undecidable manual Sn -0.41 0
IV.SBPO.HNZ. 2020-07-04T16:18:55.87 3.0 undecidable manual Sn -1.17 0
IV.PTCC.HHZ. 2020-07-04T16:18:50.23 3.0 negative manual Pg 2.29 0
IV.STAL.HNZ. 2020-07-04T16:18:46.64 3.0 undecidable manual Pg 1.91 0
IV.PTRJ.HNZ. 2020-07-04T16:18:42.99 3.0 undecidable manual Pg 10.6 0
IV.FREG.EHZ. 2020-07-04T16:18:40.80 3.0 negative manual Pn -0.16 0
IV.LRP.EHZ. 2020-07-04T16:18:40.37 3.0 undecidable manual Sn -3.92 0
IV.MTRZ.HNZ. 2020-07-04T16:18:35.87 3.0 undecidable manual Sn -1.16 0
IV.POFI.HHZ. 2020-07-04T16:18:29.02 3.0 undecidable manual Pg 6.03 0
IV.ROSPO.HHZ. 2020-07-04T16:18:27.23 3.0 undecidable manual Pn -2.4 0
IV.CSP1.EHZ. 2020-07-04T16:18:18.92 0.6 undecidable manual S 13 0.3211 50 -0.19 47
IV.RM33.EHZ. 2020-07-04T16:18:17.94 0.3 undecidable manual S 163 0.2815 50 0 74
IV.APEC.HHZ. 2020-07-04T16:18:17.60 3.0 undecidable manual Sn -0.07 0
IV.FDMO.HHZ. 2020-07-04T16:18:16.71 0.6 undecidable manual S 357 0.2581 50 -0.52 44
IT.FIE.HGZ. 2020-07-04T16:18:16.95 3.0 undecidable manual Pg 3.73 0
IV.IMOL.HNZ. 2020-07-04T16:18:16.05 3.0 positive manual Pn -2.51 0
IV.MMO1.EHZ. 2020-07-04T16:18:15.45 0.6 undecidable manual S 53 0.2023 115 -0.08 49
IV.GAVE.EHZ. 2020-07-04T16:18:14.81 0.6 undecidable manual S 241 0.1772 118 0.13 49
IV.LNSS.HNE. 2020-07-04T16:18:14.68 0.6 undecidable manual S 195 0.1826 117 -0.16 49
IV.MAON.HHZ. 2020-07-04T16:18:14.53 3.0 undecidable manual P 2.96 0
IV.RM33.EHZ. 2020-07-04T16:18:13.13 1.0 positive manual P 163 0.2815 50 -0.17 24
IV.FDMO.HHZ. 2020-07-04T16:18:13.44 0.1 undecidable manual P 357 0.2581 50 0.55 88
IV.CSP1.EHZ. 2020-07-04T16:18:13.85 0.1 undecidable manual P 13 0.3211 50 -0.13 96
IV.MC2.EHZ. 2020-07-04T16:18:13.75 0.6 undecidable manual S 25 0.1457 122 0.13 50
IV.SMA1.EHZ. 2020-07-04T16:18:12.50 0.1 undecidable manual P 131 0.2248 50 0.17 97
IV.MMO1.EHZ. 2020-07-04T16:18:11.78 0.1 undecidable manual P 53 0.2023 115 -0.13 98
IV.NRCA.HHZ. 2020-07-04T16:18:11.10 0.6 undecidable manual S 7 0.0549 149 -0.01 52
IV.GAVE.EHZ. 2020-07-04T16:18:11.31 0.1 undecidable manual P 241 0.1772 118 -0.11 99
IV.LNSS.HNE. 2020-07-04T16:18:11.47 0.1 undecidable manual P 195 0.1826 117 -0.05 100
IV.MC2.EHZ. 2020-07-04T16:18:10.95 0.6 positive manual P 25 0.1457 122 0.14 49
IV.ARRO.EHZ. 2020-07-04T16:18:09.11 3.0 undecidable manual P 1.23 0
IV.NRCA.HHZ. 2020-07-04T16:18:09.53 1.0 undecidable manual P 7 0.0549 149 0.17 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.9 0.000122 0.06 AML other m 2020-07-04T16:18:11.17
IV.NRCA.HHE. ML:1.3 0.0002975 0.16 AML other m 2020-07-04T16:18:11.24
IV.GAVE.EHN. ML:0.7 3.78E-5 0.2 AML other m 2020-07-04T16:18:15.21
IV.GAVE.EHE. ML:0.9 5.25E-5 0.44 AML other m 2020-07-04T16:18:15.20
IV.IMOL.HNN. ML:3.6 0.001135 0.06 AML other m 2020-07-04T16:18:30.56
IV.IMOL.HNE. ML:3.6 0.0010005 0.54 AML other m 2020-07-04T16:18:31.33
IV.MTRZ.HNE. ML:3.6 0.0010485 1.22 AML other m 2020-07-04T16:18:39.21
IV.MTRZ.HNN. ML:3.9 0.0019565 0.42 AML other m 2020-07-04T16:18:39.22
IV.LRP.EHN. ML:1.7 2.935E-5 1.32 AML other m 2020-07-04T16:18:44.88
IV.LRP.EHE. ML:2 6.67E-5 0.26 AML other m 2020-07-04T16:18:44.42
IV.FREG.HNN. ML:4.5 0.002365 0.7 AML other m 2020-07-04T16:18:47.37
IV.SBPO.HNN. ML:4.8 0.007465 1.9 AML other m 2020-07-04T16:18:59.95
IV.SBPO.HNE. ML:5.2 0.01905 0.08 AML other m 2020-07-04T16:19:00.34
IV.PTCC.HHE. ML:2.2 8.815E-6 0.42 AML other m 2020-07-04T16:19:08.04
IV.FREG.HNE. ML:4.2 0.001232 0.96 AML other m 2020-07-04T16:19:12.48
IV.PTCC.HHN. ML:2.2 9.79E-6 1.54 AML other m 2020-07-04T16:19:50.01
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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