INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.8 on date 19-09-2018 and time 01:24:53 (Italy) in region 7 km NW Accumoli (RI)

A magnitude ML 0.8 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 18-09-2018 23:24:53 (UTC)
  • 19-09-2018 01:24:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.73, 13.18 at 9 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
Accumoli RI 7 667 667
Norcia PG 10 4957 5624
Arquata del Tronto AP 11 1178 6802
Cittareale RI 12 482 7284
Cascia PG 13 3217 10501
Amatrice RI 14 2657 13158
Montegallo AP 18 523 13681
Castelsantangelo sul Nera MC 19 281 13962
Poggiodomo PG 20 117 14079
Acquasanta Terme AP 20 2916 16995

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
46 Km NW of L'Aquila (69753 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Pescara (121014 inhabitants)
90 Km NE of Tivoli (56533 inhabitants)
91 Km W of Chieti (51815 inhabitants)
94 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 2018-09-18
23:24:53
42.73 13.18 9 2018-09-18
23:28:38
Sala Sismica INGV-Roma 61083031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-18 23:24:53 ± 0.08
Latitude 42.73 ± 0.00
Longitude 13.18 ± 0.00
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61083031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 439
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 20
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) 0.36512
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 61083031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-18 23:28:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2018-09-18T23:25:44.29 3.0 undecidable manual Sn 0.95 0
IV.TOLF.HHZ. 2018-09-18T23:25:16.62 3.0 undecidable manual P 1.74 0
IV.SAMA.HHZ. 2018-09-18T23:25:14.37 3.0 positive manual P 0.27 0
IV.MF5.EHZ. 2018-09-18T23:25:07.00 0.6 undecidable manual S 38 0.3336 50 0.86 51
IV.CSP1.EHZ. 2018-09-18T23:25:07.00 0.6 undecidable manual S 3 0.3651 50 -0.09 65
IV.CESI.HHZ. 2018-09-18T23:25:06.09 0.6 undecidable manual S 325 0.3417 50 -0.29 62
IV.RM33.EHZ. 2018-09-18T23:25:02.32 0.6 undecidable manual S 173 0.2194 111 -0.13 66
OB.GAVE.EHZ. 2018-09-18T23:25:02.20 0.6 undecidable manual S 261 0.2095 112 0.09 67
IV.MC2.EHZ. 2018-09-18T23:25:01.49 0.6 undecidable manual S 3 0.1844 114 0.27 64
IV.MMO1.EHZ. 2018-09-18T23:25:01.70 0.6 undecidable manual S 33 0.205 112 -0.23 65
IV.CSP1.EHZ. 2018-09-18T23:25:01.27 1.0 positive manual P 3 0.3651 50 -0.03 33
IV.TERO.HHZ. 2018-09-18T23:25:00.46 3.0 undecidable manual P -0.13 0
IV.MTRA.EHZ. 2018-09-18T23:25:00.16 0.6 undecidable manual S 79 0.1646 117 -0.36 63
IV.CESI.HHZ. 2018-09-18T23:25:00.65 0.6 negative manual P 325 0.3417 50 -0.25 63
IV.MF5.EHZ. 2018-09-18T23:25:00.42 1.0 undecidable manual P 38 0.3336 50 -0.34 31
IV.SMA1.EHZ. 2018-09-18T23:25:00.24 0.6 undecidable manual S 129 0.1511 119 0.17 66
IV.MMO1.EHZ. 2018-09-18T23:24:58.17 0.3 negative manual P 33 0.205 112 -0.16 99
OB.GAVE.EHZ. 2018-09-18T23:24:58.49 1.0 positive manual P 261 0.2095 112 0.06 33
IV.RM33.EHZ. 2018-09-18T23:24:58.67 0.6 undecidable manual P 173 0.2194 111 0.04 67
IV.NRCA.HHZ. 2018-09-18T23:24:58.96 0.6 undecidable manual S 337 0.116 126 0.04 68
IV.MC2.EHZ. 2018-09-18T23:24:58.16 1.0 undecidable manual P 3 0.1844 114 0.24 32
IV.SMA1.EHZ. 2018-09-18T23:24:57.39 0.3 positive manual P 129 0.1511 119 0.14 100
IV.MTRA.EHZ. 2018-09-18T23:24:57.47 0.6 negative manual P 79 0.1646 117 -0.04 68
IV.NRCA.HHZ. 2018-09-18T23:24:56.75 0.6 undecidable manual P 337 0.116 126 0.16 67
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.000386 0.3 AML other m 2018-09-18T23:24:59.15
IV.NRCA.HHN. ML:1.5 0.0003775 0.06 AML other m 2018-09-18T23:24:59.00
IV.MTRA.EHE. ML:1 8.635E-5 0.28 AML other m 2018-09-18T23:25:00.47
IV.MTRA.EHN. ML:1 8.53E-5 0.72 AML other m 2018-09-18T23:25:00.71
IV.SMA1.EHE. ML:0.7 4.675E-5 1.58 AML other m 2018-09-18T23:25:00.84
IV.SMA1.EHN. ML:0.6 3.635E-5 0.12 AML other m 2018-09-18T23:25:01.20
IV.RM33.EHN. ML:0.6 2.51E-5 1.1 AML other m 2018-09-18T23:25:02.17
IV.RM33.EHE. ML:0.6 2.605E-5 0.12 AML other m 2018-09-18T23:25:02.94
OB.GAVE.EHN. ML:0.8 4.445E-5 1.76 AML other m 2018-09-18T23:25:02.90
OB.GAVE.EHE. ML:0.7 3.12E-5 1.38 AML other m 2018-09-18T23:25:03.90
IV.TERO.HHN. ML:0.9 2.855E-5 0.06 AML other m 2018-09-18T23:25:05.75
IV.TERO.HHE. ML:0.7 2.135E-5 1.56 AML other m 2018-09-18T23:25:06.78
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