INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.0 on date 11-08-2018 and time 03:44:50 (Italy) in region 4 km NW Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km NW Norcia (PG), on

  • 11-08-2018 01:44:50 (UTC)
  • 11-08-2018 03:44:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.08 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.

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 4 4957 4957
Preci PG 7 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Visso MC 12 1107 7069
Cascia PG 13 3217 10286
Cerreto di Spoleto PG 13 1075 11361
Sellano PG 14 1079 12440
Ussita MC 14 444 12884
Poggiodomo PG 17 117 13001
Vallo di Nera PG 19 364 13365
Arquata del Tronto AP 19 1178 14543
Monte Cavallo MC 20 145 14688

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
64 Km E of Perugia (166134 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
99 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 1.0 2018-08-11
01:44:50
42.83 13.08 11 2018-08-11
01:49:51
Sala Sismica INGV-Roma 59612091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-11 01:44:50 ± 0.06
Latitude 42.83 ± 0.00
Longitude 13.08 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59612091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 453
Semi-minor axis of confidence ellipse (meter) 338
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42088
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 59612091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-11 01:49:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SACS.HHZ. 2018-08-11T01:45:19.58 3.0 undecidable manual S -0.88 0
IV.ARVD.HHZ. 2018-08-11T01:45:15.11 3.0 undecidable manual S -0.35 0
IV.OFFI.HHZ. 2018-08-11T01:45:01.46 3.0 undecidable manual P 0.64 0
IV.ATCC.EHZ. 2018-08-11T01:45:00.60 3.0 undecidable manual P -0.15 0
IV.CESX.HHE. 2018-08-11T01:45:00.08 0.3 undecidable manual P 239 0.4209 50 0.54 62
IV.MTRA.EHZ. 2018-08-11T01:45:00.83 0.3 undecidable manual S 106 0.2437 50 0.21 69
IV.MMO1.EHZ. 2018-08-11T01:44:59.12 0.1 undecidable manual S 68 0.197 50 -0.11 95
IV.FDMO.HHZ. 2018-08-11T01:44:59.35 0.1 undecidable manual S 2 0.2104 50 -0.28 91
IV.CESI.HHZ. 2018-08-11T01:44:59.94 0.1 undecidable manual S 325 0.2194 50 0.06 95
IV.CAMP.HHZ. 2018-08-11T01:44:58.57 0.3 undecidable manual P 140 0.3786 50 -0.25 67
IV.RM33.EHZ. 2018-08-11T01:44:58.01 0.3 undecidable manual P 162 0.3327 50 -0.02 71
IV.CSP1.EHZ. 2018-08-11T01:44:57.30 0.3 undecidable manual P 19 0.2815 50 0.14 70
IV.ARRO.EHZ. 2018-08-11T01:44:57.98 0.6 negative manual P 223 0.3363 50 -0.12 46
IV.FEMA.HNE. 2018-08-11T01:44:57.29 0.3 undecidable manual S 352 0.1376 126 -0.14 72
IV.MC2.EHZ. 2018-08-11T01:44:57.16 0.1 undecidable manual S 44 0.1187 130 0.32 92
IV.CESI.HHZ. 2018-08-11T01:44:56.06 0.1 positive manual P 325 0.2194 50 -0.03 96
IV.LNSS.HHE. 2018-08-11T01:44:56.03 0.3 undecidable manual P 187 0.2248 50 -0.15 70
IV.MTRA.EHZ. 2018-08-11T01:44:56.54 0.6 undecidable manual P 106 0.2437 50 0.02 48
IV.T1299.EHZ. 2018-08-11T01:44:56.62 0.3 undecidable manual P 142 0.2437 50 0.11 70
IV.SMA1.EHZ. 2018-08-11T01:44:56.86 0.3 undecidable manual P 136 0.2716 50 -0.13 70
IV.MMO1.EHZ. 2018-08-11T01:44:55.69 0.1 undecidable manual P 68 0.197 50 -0.02 97
IV.FDMO.HHZ. 2018-08-11T01:44:55.92 0.6 negative manual P 2 0.2104 50 -0.03 48
IV.FEMA.HNE. 2018-08-11T01:44:54.75 0.3 undecidable manual P 352 0.1376 126 0.08 72
IV.MC2.EHZ. 2018-08-11T01:44:54.57 0.1 negative manual P 44 0.1187 130 0.24 94
IV.NRCA.HHZ. 2018-08-11T01:44:54.50 0.1 undecidable manual S 74 0.0279 164 -0.36 93
IV.NRCA.HHZ. 2018-08-11T01:44:53.18 0.1 undecidable manual P 74 0.0279 164 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.9 0.0012175 0.06 AML other m 2018-08-11T01:44:54.55
IV.NRCA.HHN. ML:1.9 0.001375 0.06 AML other m 2018-08-11T01:44:54.55
IV.NRCA.HNE. ML:1.7 0.000867 0.18 AML other m 2018-08-11T01:44:54.56
IV.NRCA.HHE. ML:1.7 0.0009335 0.18 AML other m 2018-08-11T01:44:54.56
IV.CESI.HHE. ML:1.1 7.66E-5 0.18 AML other m 2018-08-11T01:45:00.12
IV.FDMO.HHE. ML:1.1 8.17E-5 1.34 AML other m 2018-08-11T01:45:00.72
IV.FDMO.HHN. ML:1.1 7.77E-5 0.84 AML other m 2018-08-11T01:45:00.69
IV.CESI.HHN. ML:1.3 0.000124 0.42 AML other m 2018-08-11T01:45:00.40
IV.SMA1.EHE. ML:0.9 4.115E-5 0.2 AML other m 2018-08-11T01:45:02.57
IV.SMA1.EHN. ML:0.9 3.285E-5 0.32 AML other m 2018-08-11T01:45:03.46
IV.ARRO.EHE. ML:0.9 3.155E-5 1.2 AML other m 2018-08-11T01:45:04.31
IV.RM33.EHE. ML:0.9 2.825E-5 0.64 AML other m 2018-08-11T01:45:04.34
IV.ARRO.EHN. ML:0.9 3.105E-5 0.16 AML other m 2018-08-11T01:45:04.79
IV.RM33.EHN. ML:0.7 2.13E-5 0.14 AML other m 2018-08-11T01:45:05.17
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