INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 25-09-2018 and time 19:42:05 (Italy) in region 3 km SW Accumoli (RI)

A magnitude ML 1.1 earthquake occured in region: 3 km SW Accumoli (RI), on

  • 25-09-2018 17:42:05 (UTC)
  • 25-09-2018 19:42:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.22 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
Accumoli RI 3 667 667
Amatrice RI 8 2657 3324
Cittareale RI 9 482 3806
Arquata del Tronto AP 12 1178 4984
Norcia PG 16 4957 9941
Montereale AQ 17 2581 12522
Cascia PG 18 3217 15739
Campotosto AQ 18 542 16281
Acquasanta Terme AP 18 2916 19197
Capitignano AQ 19 665 19862
Borbona RI 20 617 20479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of L'Aquila (69753 inhabitants)
40 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
96 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 1.1 2018-09-25
17:42:05
42.68 13.22 10 2018-09-25
17:50:37
Sala Sismica INGV-Roma 61305791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-25 17:42:05 ± 0.1
Latitude 42.68 ± 0.00
Longitude 13.22 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61305791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 507
Semi-minor axis of confidence ellipse (meter) 498
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 120
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.35343
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 61305791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-25 17:50:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2018-09-25T17:42:19.27 0.3 undecidable manual S 29 0.3534 50 0.96 54
IV.TERO.HHZ. 2018-09-25T17:42:15.79 0.3 undecidable manual S 101 0.286 50 -0.53 66
IV.MMO1.EHZ. 2018-09-25T17:42:14.43 0.3 undecidable manual S 19 0.232 50 -0.29 70
IV.CAMP.HHE. 2018-09-25T17:42:13.47 0.3 undecidable manual S 136 0.1988 115 -0.2 72
IV.MF5.EHZ. 2018-09-25T17:42:13.15 0.1 undecidable manual P 29 0.3534 50 0.38 90
IV.NRCA.HHZ. 2018-09-25T17:42:12.46 0.1 undecidable manual S 333 0.1727 118 -0.31 94
IV.RM33.EHZ. 2018-09-25T17:42:12.51 0.3 undecidable manual S 182 0.1709 118 -0.2 72
IV.LNSS.HHZ. 2018-09-25T17:42:12.13 0.3 undecidable manual S 240 0.1547 121 -0.04 75
IV.TERO.HHZ. 2018-09-25T17:42:11.47 0.1 undecidable manual P 101 0.286 50 -0.16 95
IV.MTRA.EHZ. 2018-09-25T17:42:11.73 0.1 undecidable manual S 59 0.1484 122 -0.24 96
IV.MMO1.EHZ. 2018-09-25T17:42:10.43 0.3 undecidable manual P 19 0.232 50 -0.27 70
IV.SMA1.EHZ. 2018-09-25T17:42:10.66 0.6 undecidable manual S 121 0.0962 134 0.29 48
IV.CAMP.HHE. 2018-09-25T17:42:10.09 0.1 undecidable manual P 136 0.1988 115 -0.01 100
IV.LNSS.HHZ. 2018-09-25T17:42:09.28 0.1 undecidable manual P 240 0.1547 121 0.05 100
IV.MTRA.EHZ. 2018-09-25T17:42:09.16 0.1 undecidable manual P 59 0.1484 122 0.05 100
IV.NRCA.HHZ. 2018-09-25T17:42:09.55 0.1 negative manual P 333 0.1727 118 -0.02 100
IV.RM33.EHZ. 2018-09-25T17:42:09.67 0.3 undecidable manual P 182 0.1709 118 0.13 73
IV.SMA1.EHZ. 2018-09-25T17:42:08.62 0.3 undecidable manual P 121 0.0962 134 0.43 70
IV.T1299.HNN. 2018-09-25T17:42:08.07 0.3 undecidable manual P 136 0.063 146 0.36 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.6 0.0002725 0.14 AML other m 2018-09-25T17:42:12.62
IV.NRCA.HHN. ML:1.2 0.000115 0.14 AML other m 2018-09-25T17:42:12.90
IV.SMA1.EHN. ML:1.2 0.00017217735 0.3456 AML other m 2018-09-25T17:42:11.37
IV.SMA1.EHE. ML:1.2 0.00020244225 0.1408 AML other m 2018-09-25T17:42:11.42
IV.MTRA.EHE. ML:1 9.462666E-5 0.1536 AML other m 2018-09-25T17:42:11.81
IV.MTRA.HNN. ML:1.2 0.00013555135 0.1536 AML other m 2018-09-25T17:42:11.88
IV.MTRA.EHN. ML:1 9.682177E-5 0.064 AML other m 2018-09-25T17:42:11.87
IV.MTRA.HNE. ML:1 8.2925935E-5 0.6272 AML other m 2018-09-25T17:42:12.04
IV.NRCA.HNE. ML:1.6 0.000272968 0.1408 AML other m 2018-09-25T17:42:12.70
IV.NRCA.HNN. ML:1.2 0.000110442245 0.1024 AML other m 2018-09-25T17:42:12.71
IV.RM33.HNE. ML:1.2 0.000125732255 0.2304 AML other m 2018-09-25T17:42:13.54
IV.RM33.EHE. ML:1.1 0.0001029036 0.2944 AML other m 2018-09-25T17:42:12.00
IV.RM33.EHN. ML:1.1 0.00010200069 0.128 AML other m 2018-09-25T17:42:12.93
IV.TERO.HHE. ML:0.6 2.193949E-5 0.6784 AML other m 2018-09-25T17:42:16.00
IV.TERO.HHN. ML:1 4.3145275E-5 0.1408 AML other m 2018-09-25T17:42:16.58
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