INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.6 on date 21-09-2018 and time 07:30:07 (Italy) in region 5 km N Ussita (MC)

A magnitude ML 1.6 earthquake occured in region: 5 km N Ussita (MC), on

  • 21-09-2018 05:30:07 (UTC)
  • 21-09-2018 07:30:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.99, 13.12 at 6 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 5 444 444
Fiastra MC 6 559 1003
Fiordimonte MC 6 202 1205
Acquacanina MC 6 121 1326
Visso MC 7 1107 2433
Bolognola MC 8 142 2575
Pieve Torina MC 9 1458 4033
Pievebovigliana MC 9 866 4899
Monte Cavallo MC 10 145 5044
Castelsantangelo sul Nera MC 11 281 5325
Muccia MC 13 915 6240
Preci PG 14 724 6964
Sarnano MC 15 3264 10228
Serravalle di Chienti MC 17 1070 11298
Camerino MC 17 6974 18272
Cessapalombo MC 18 512 18784
Montefortino FM 18 1178 19962
Caldarola MC 19 1823 21785
Amandola FM 19 3629 25414
Montemonaco AP 19 604 26018
Sellano PG 19 1079 27097
Gualdo MC 20 815 27912
Camporotondo di Fiastrone MC 20 563 28475

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
60 Km NW of Teramo (54892 inhabitants)
61 Km E of Perugia (166134 inhabitants)
61 Km NE of Terni (111501 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
96 Km S of Fano (60888 inhabitants)
99 Km NW of Montesilvano (53738 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
05:30:07
42.99 13.12 6 2018-09-21
05:35:30
Sala Sismica INGV-Roma 61169871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-21 05:30:07 ± 0.24
Latitude 42.99 ± 0.01
Longitude 13.12 ± 0.01
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61169871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 507
Semi-minor axis of confidence ellipse (meter) 288
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 193
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) 62
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.17177
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 8
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 61169871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-21 05:35:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SBPO.HNZ. 2018-09-21T05:31:30.74 3.0 undecidable manual Sg 7.72 0
IV.OVO.HHZ. 2018-09-21T05:31:17.97 3.0 undecidable manual Sg 1 0
IV.OSSC.HHZ. 2018-09-21T05:30:55.51 3.0 undecidable manual S 0.17 0
YD.T1412.EHZ. 2018-09-21T05:30:40.80 3.0 negative manual Pg 3.07 0
TV.SF04.EHZ. 2018-09-21T05:30:29.12 3.0 undecidable manual P 0.01 0
IV.TERO.HHZ. 2018-09-21T05:30:17.90 3.0 undecidable manual P -0.63 0
IV.CAMP.HHZ. 2018-09-21T05:30:17.33 3.0 undecidable manual P -1 0
IV.SMA1.EHZ. 2018-09-21T05:30:15.62 3.0 positive manual P -0.7 0
IV.GUMA.HHZ. 2018-09-21T05:30:15.46 0.3 undecidable manual S 64 0.1709 108 0.61 64
IV.MMO1.EHZ. 2018-09-21T05:30:14.84 0.3 undecidable manual S 121 0.1718 108 -0.04 73
IV.EL6.EHZ. 2018-09-21T05:30:14.87 3.0 negative manual P -0.52 0
IV.CESI.HHZ. 2018-09-21T05:30:14.86 0.1 undecidable manual S 276 0.1619 109 0.35 92
IV.ASSB.HHZ. 2018-09-21T05:30:14.97 3.0 negative manual P -0.42 0
IV.NRCA.HHZ. 2018-09-21T05:30:14.60 0.3 undecidable manual S 183 0.1538 110 0.38 68
OB.GAVE.EHZ. 2018-09-21T05:30:14.95 3.0 undecidable manual P -0.29 0
IV.CSP1.EHZ. 2018-09-21T05:30:12.95 0.3 undecidable manual S 29 0.1196 115 -0.05 74
IV.GUMA.HHZ. 2018-09-21T05:30:12.24 0.6 negative manual P 64 0.1709 108 0.33 46
IV.NRCA.HHZ. 2018-09-21T05:30:11.35 0.1 negative manual P 183 0.1538 110 -0.2 95
IV.MMO1.EHZ. 2018-09-21T05:30:11.63 0.1 negative manual P 121 0.1718 108 -0.3 92
IV.CESI.HHZ. 2018-09-21T05:30:11.66 0.1 positive manual P 276 0.1619 109 -0.06 97
IV.MC2.EHZ. 2018-09-21T05:30:10.14 0.3 negative manual P 148 0.089 122 -0.11 73
IV.FDMO.HHZ. 2018-09-21T05:30:10.85 0.3 undecidable manual S 331 0.0558 135 -0.12 74
IV.CSP1.EHZ. 2018-09-21T05:30:10.72 0.3 positive manual P 29 0.1196 115 -0.13 73
IV.FDMO.HHZ. 2018-09-21T05:30:09.30 0.3 undecidable manual P 331 0.0558 135 -0.37 70
IV.FEMA.HNN. 2018-09-21T05:30:09.72 0.1 undecidable manual P 245 0.0603 133 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.3 0.000188 1.46 AML other m 2018-09-21T05:30:15.03
IV.NRCA.HNN. ML:1.7 0.0005145 0.14 AML other m 2018-09-21T05:30:15.27
IV.NRCA.HHN. ML:1.8 0.00056 0.14 AML other m 2018-09-21T05:30:15.27
IV.NRCA.HNE. ML:1.6 0.0003845 0.14 AML other m 2018-09-21T05:30:15.90
IV.NRCA.HHE. ML:1.6 0.000408 0.14 AML other m 2018-09-21T05:30:15.83
IV.CESI.HHN. ML:1.5 0.0002715 0.24 AML other m 2018-09-21T05:30:16.22
IV.GUMA.HHN. ML:1.7 0.000439 0.34 AML other m 2018-09-21T05:30:18.43
IV.CSP1.EHN. ML:1.9 0.000905 1.58 AML other m 2018-09-21T05:30:19.92
IV.CSP1.EHE. ML:2.3 0.0024 0.42 AML other m 2018-09-21T05:30:19.19
IV.GUMA.HHE. ML:1.7 0.0004175 0.38 AML other m 2018-09-21T05:30:20.47
IV.ASSB.HHN. ML:1.4 9.815E-5 0.7 AML other m 2018-09-21T05:30:21.89
OB.GAVE.EHN. ML:1.8 0.000231 0.26 AML other m 2018-09-21T05:30:21.82
OB.GAVE.EHE. ML:1.8 0.0002485 0.26 AML other m 2018-09-21T05:30:21.97
IV.ASSB.HHE. ML:1.4 9.49E-5 0.24 AML other m 2018-09-21T05:30:23.33
IV.TERO.HHE. ML:1 2.745E-5 0.28 AML other m 2018-09-21T05:30:26.44
IV.TERO.HHN. ML:1 2.515E-5 0.62 AML other m 2018-09-21T05:30:27.80
IV.SMA1.EHN. ML:1 3.735E-5 0.3 AML other m 2018-09-21T05:30:28.06
IV.SMA1.EHE. ML:1.3 5.795E-5 1.08 AML other m 2018-09-21T05:30:28.14
TV.SF04.EHE. ML:3.3 0.001435 0.54 AML other m 2018-09-21T05:30:37.63
TV.SF04.EHN. ML:3.2 0.00117 0.06 AML other m 2018-09-21T05:30:38.78
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