INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.8 on date 08-08-2018 and time 03:09:40 (Italy) in region 8 km E Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 8 km E Norcia (PG), on

  • 08-08-2018 01:09:40 (UTC)
  • 08-08-2018 03:09:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.19 at 3 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 8 4957 4957
Arquata del Tronto AP 9 1178 6135
Accumoli RI 10 667 6802
Castelsantangelo sul Nera MC 13 281 7083
Montegallo AP 14 523 7606
Cascia PG 16 3217 10823
Preci PG 17 724 11547
Montemonaco AP 18 604 12151
Acquasanta Terme AP 18 2916 15067
Cittareale RI 18 482 15549
Amatrice RI 18 2657 18206
Visso MC 19 1107 19313
Ussita MC 19 444 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
44 Km E of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km S of Ancona (100861 inhabitants)
97 Km E of Viterbo (67173 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 0.8 2018-08-08
01:09:40
42.78 13.19 3 2018-08-08
01:22:50
Sala Sismica INGV-Roma 59494471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-08 01:09:40 ± 0.2
Latitude 42.78 ± 0.00
Longitude 13.19 ± 0.01
Depth (km) 3 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59494471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 527
Semi-minor axis of confidence ellipse (meter) 427
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 301
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29048
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 59494471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-08 01:22:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.APEC.HHZ. 2018-08-08T01:09:58.85 3.0 negative manual P 0.36 0
IV.CAMP.HHZ. 2018-08-08T01:09:51.21 0.1 undecidable manual S 146 0.2905 96 -0.16 94
IV.MF5.EHZ. 2018-08-08T01:09:51.62 0.1 undecidable manual S 43 0.2878 96 0.35 90
IV.ATCC.EHZ. 2018-08-08T01:09:50.71 3.0 undecidable manual P -0.55 0
IV.LNSS.HHZ. 2018-08-08T01:09:48.49 0.1 undecidable manual S 212 0.2068 98 0.31 92
IV.TERO.HHZ. 2018-08-08T01:09:47.38 3.0 undecidable manual P -0.13 0
IV.GUMA.HHZ. 2018-08-08T01:09:46.55 3.0 undecidable manual P -0.01 0
IV.CAMP.HHZ. 2018-08-08T01:09:46.26 0.1 undecidable manual P 146 0.2905 96 -0.35 90
IV.MMO1.EHZ. 2018-08-08T01:09:46.34 0.1 undecidable manual S 39 0.1574 101 0.05 98
IV.MF5.EHZ. 2018-08-08T01:09:46.38 0.1 undecidable manual P 43 0.2878 96 -0.18 93
IV.MC2.EHZ. 2018-08-08T01:09:45.43 0.1 undecidable manual S 359 0.1331 103 0.04 99
IV.LNSS.HHZ. 2018-08-08T01:09:44.76 0.1 undecidable manual P 212 0.2068 98 -0.01 98
IV.SMA1.EHZ. 2018-08-08T01:09:44.48 0.1 undecidable manual P 144 0.1817 100 0.26 93
IV.MMO1.EHZ. 2018-08-08T01:09:43.56 0.1 undecidable manual P 39 0.1574 101 -0.12 97
IV.MC2.EHZ. 2018-08-08T01:09:43.15 0.1 undecidable manual P 359 0.1331 103 -0.01 99
IV.NRCA.HHZ. 2018-08-08T01:09:43.23 0.1 undecidable manual S 315 0.0791 111 -0.15 98
IV.NRCA.HHZ. 2018-08-08T01:09:41.97 0.1 positive manual P 315 0.0791 111 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:0 0.00106 0.18 AML other m 2018-08-08T01:09:43.29
IV.NRCA.HHE. ML:0 0.001115 0.16 AML other m 2018-08-08T01:09:43.29
IV.NRCA.HHN. ML:0 0.0009505 0.1 AML other m 2018-08-08T01:09:43.38
IV.NRCA.HNN. ML:0 0.000895 0.1 AML other m 2018-08-08T01:09:43.39
IV.LNSS.HHN. ML:1.2 0.0001208 0.14 AML other m 2018-08-08T01:09:48.75
IV.LNSS.HHE. ML:1.5 0.0002095 0.22 AML other m 2018-08-08T01:09:48.77
IV.SMA1.EHE. ML:0.6 2.89E-5 1.66 AML other m 2018-08-08T01:09:51.91
IV.SMA1.EHN. ML:0.5 2.335E-5 0.76 AML other m 2018-08-08T01:09:52.21
IV.TERO.HHE. ML:0.7 2.24E-5 0.08 AML other m 2018-08-08T01:09:53.12
IV.TERO.HHN. ML:0.9 2.99E-5 0.94 AML other m 2018-08-08T01:09:53.63
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