INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.6 on date 21-09-2018 and time 07:52:37 (Italy) in region 6 km NW Ussita (MC)

A magnitude ML 1.6 earthquake occured in region: 6 km NW Ussita (MC), on

  • 21-09-2018 05:52:37 (UTC)
  • 21-09-2018 07:52:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.99, 13.1 at 8 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
Ussita MC 6 444 444
Fiordimonte MC 6 202 646
Visso MC 6 1107 1753
Fiastra MC 7 559 2312
Pieve Torina MC 8 1458 3770
Acquacanina MC 8 121 3891
Monte Cavallo MC 8 145 4036
Pievebovigliana MC 9 866 4902
Bolognola MC 10 142 5044
Castelsantangelo sul Nera MC 11 281 5325
Muccia MC 12 915 6240
Preci PG 13 724 6964
Serravalle di Chienti MC 15 1070 8034
Camerino MC 17 6974 15008
Sarnano MC 17 3264 18272
Sellano PG 18 1079 19351
Cessapalombo MC 19 512 19863
Caldarola MC 20 1823 21686

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
59 Km E of Perugia (166134 inhabitants)
60 Km NE of Terni (111501 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
96 Km S of Fano (60888 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 1.6 2018-09-21
05:52:37
42.99 13.1 8 2018-09-21
06:00:13
Sala Sismica INGV-Roma 61170351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-21 05:52:37 ± 0.12
Latitude 42.99 ± 0.00
Longitude 13.10 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61170351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 829
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 830
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50452
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 61170351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-21 06:00:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.QLNO.HHZ. 2018-09-21T05:54:30.08 3.0 undecidable manual Sg 12.52 0
IV.CROCE.HHZ. 2018-09-21T05:54:25.83 3.0 positive manual Pg 16.379999 0
IV.EUCT.HNZ. 2018-09-21T05:54:17.15 3.0 undecidable manual Sn 1.14 0
IV.BAG8.HNZ. 2018-09-21T05:54:08.20 3.0 undecidable manual Sn -3.48 0
AC.VLO.HHZ. 2018-09-21T05:54:04.88 3.0 negative manual Pn 5.56 0
MN.TRI.HHZ. 2018-09-21T05:54:01.75 3.0 undecidable manual Sg 3.63 0
IV.IFIL.HHZ. 2018-09-21T05:53:49.79 3.0 undecidable manual Pn 3.38 0
IV.SBPO.HNZ. 2018-09-21T05:53:45.96 3.0 undecidable manual Sn -5.73 0
GU.POPM.HHZ. 2018-09-21T05:53:41.70 3.0 undecidable manual Sg 5.23 0
IV.BORM.HNZ. 2018-09-21T05:53:32.89 3.0 undecidable manual Pn -4.98 0
IV.AGLI.HHZ. 2018-09-21T05:53:31.36 3.0 negative manual Pn 1.65 0
IV.NDIM.HHZ. 2018-09-21T05:53:20.29 3.0 positive manual Pg 3.41 0
IV.MRB1.HHZ. 2018-09-21T05:53:13.56 3.0 undecidable manual Pn -2.84 0
IV.CIGN.HHZ. 2018-09-21T05:53:09.96 3.0 undecidable manual Pn -0.65 0
IV.OSSC.HHZ. 2018-09-21T05:53:03.98 3.0 undecidable manual Pg 1.7 0
IV.RMP.HHZ. 2018-09-21T05:52:53.27 3.0 undecidable manual P -6.45 0
IV.EL6.EHZ. 2018-09-21T05:52:50.97 0.6 undecidable manual S 0 0.3417 50 0.22 46
IV.MF5.EHZ. 2018-09-21T05:52:48.71 0.6 undecidable manual S 90 0.2617 106 0.73 40
IV.CAMP.HHZ. 2018-09-21T05:52:47.49 0.6 positive manual P 153 0.5045 50 -0.46 42
IV.MOMA.HHZ. 2018-09-21T05:52:47.15 1.0 undecidable manual S -1.42 0.59
IV.FOSV.EHZ. 2018-09-21T05:52:46.25 1.0 undecidable manual S -3.73 0.59
IV.ASSB.HHZ. 2018-09-21T05:52:45.08 0.3 undecidable manual S 0.39 1.76
IV.EL6.EHZ. 2018-09-21T05:52:45.04 0.6 negative manual P 0 0.3417 50 -0.12 47
OB.GAVE.EHZ. 2018-09-21T05:52:45.04 0.3 undecidable manual Sn -1.97 1.76
IV.NRCA.HHZ. 2018-09-21T05:52:44.68 0.6 undecidable manual S 177 0.1547 115 0.59 43
IV.MMO1.EHZ. 2018-09-21T05:52:44.89 0.6 undecidable manual S 118 0.1871 111 -0.35 46
IV.CSP1.EHZ. 2018-09-21T05:52:43.16 0.6 undecidable manual S 36 0.1286 120 -0.05 49
IV.MF5.EHZ. 2018-09-21T05:52:43.74 1.0 negative manual P 90 0.2617 106 0.18 23
IV.MC2.EHZ. 2018-09-21T05:52:42.02 0.6 undecidable manual S 140 0.0998 126 -0.25 48
IV.MMO1.EHZ. 2018-09-21T05:52:41.76 0.1 negative manual P 118 0.1871 111 -0.22 94
IV.NRCA.HHZ. 2018-09-21T05:52:41.49 0.1 negative manual P 177 0.1547 115 0.18 96
IV.MC2.EHZ. 2018-09-21T05:52:40.19 0.1 undecidable manual P 140 0.0998 126 -0.07 99
IV.CSP1.EHZ. 2018-09-21T05:52:40.91 0.1 undecidable manual P 36 0.1286 120 0.1 98
IV.FDMO.HHZ. 2018-09-21T05:52:40.86 0.1 undecidable manual S 348 0.0504 146 -0.06 100
IV.FDMO.HHZ. 2018-09-21T05:52:39.42 0.1 undecidable manual P 348 0.0504 146 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0 0.00174 0.62 AML other m 2018-09-21T05:52:41.56
IV.FDMO.HHN. ML:0 0.0015 0.14 AML other m 2018-09-21T05:52:41.33
IV.NRCA.HHE. ML:1.9 0.0006915 0.5 AML other m 2018-09-21T05:52:45.39
IV.NRCA.HNN. ML:1.8 0.0006095 0.42 AML other m 2018-09-21T05:52:45.25
IV.NRCA.HHN. ML:1.9 0.0006745 0.14 AML other m 2018-09-21T05:52:45.38
IV.NRCA.HNE. ML:1.9 0.0007415 1.12 AML other m 2018-09-21T05:52:45.39
IV.MF5.EHE. ML:1.6 0.0001895 0.54 AML other m 2018-09-21T05:52:49.12
IV.MF5.EHN. ML:1.5 0.000177 0.38 AML other m 2018-09-21T05:52:50.87
OB.GAVE.EHN. ML:1.9 0.000335 0.96 AML other m 2018-09-21T05:52:51.47
OB.GAVE.EHE. ML:2 0.000343 1.74 AML other m 2018-09-21T05:52:52.10
IV.ASSB.HHN. ML:1.5 0.000128 0.74 AML other m 2018-09-21T05:52:52.05
IV.ASSB.HHE. ML:1.6 0.0001445 0.32 AML other m 2018-09-21T05:52:53.48
IV.FOSV.EHN. ML:1.5 9.95E-5 0.28 AML other m 2018-09-21T05:52:53.88
IV.FOSV.EHE. ML:1.4 7.735E-5 0.24 AML other m 2018-09-21T05:52:53.87
IV.MOMA.HHE. ML:1.4 6.63E-5 0.84 AML other m 2018-09-21T05:52:56.64
IV.CAMP.HHN. ML:1 2.345E-5 0.22 AML other m 2018-09-21T05:52:56.71
IV.MOMA.HHN. ML:1.3 5.965E-5 0.16 AML other m 2018-09-21T05:52:56.83
IV.CAMP.HHE. ML:1.1 3.09E-5 0.42 AML other m 2018-09-21T05:52:57.91
IV.NDIM.HNN. ML:3.9 0.0012205 0.68 AML other m 2018-09-21T05:53:23.39
IV.MRB1.HHN. ML:3 0.0001765 0.06 AML other m 2018-09-21T05:53:32.98
IV.MRB1.HHE. ML:3 0.0001525 0.06 AML other m 2018-09-21T05:53:37.11
GU.POPM.HHN. ML:2.1 2.805E-5 0.6 AML other m 2018-09-21T05:53:50.94
GU.POPM.HHE. ML:1.9 2.135E-5 0.1 AML other m 2018-09-21T05:53:54.83
IV.NDIM.HNE. ML:4.2 0.00217 1.92 AML other m 2018-09-21T05:54:03.03
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