Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 20-09-2020 and time 09:33:30 (Italy) in region 2 km N Ussita (MC)

A magnitude ML 0.8 earthquake occured in region: 2 km N Ussita (MC), on

  • 20-09-2020 07:33:30 (UTC)
  • 20-09-2020 09:33:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9610, 13.1440 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.

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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 2 444 444
Visso MC 6 1107 1551
Castelsantangelo sul Nera MC 7 281 1832
Bolognola MC 8 142 1974
Acquacanina MC 8 121 2095
Fiastra MC 9 559 2654
Fiordimonte MC 10 202 2856
Pieve Torina MC 12 1458 4314
Monte Cavallo MC 12 145 4459
Pievebovigliana MC 12 866 5325
Preci PG 12 724 6049
Sarnano MC 15 3264 9313
Muccia MC 16 915 10228
Montefortino FM 16 1178 11406
Montemonaco AP 16 604 12010
Amandola FM 17 3629 15639
Cessapalombo MC 19 512 16151
Norcia PG 19 4957 21108
Sellano PG 19 1079 22187
Gualdo MC 20 815 23002
Serravalle di Chienti MC 20 1070 24072

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
60 Km NE of Terni (111501 inhabitants)
64 Km E of Perugia (166134 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
96 Km NW of Montesilvano (53738 inhabitants)
99 Km S of Fano (60888 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.8 2020-09-20
07:33:30		 42.9612 13.1442 10 2020-09-20
07:40:51		 Sala Sismica INGV-Roma 83050451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-20 07:33:30 ± 0.17
Latitude 42.9612 ± 0.0036
Longitude 13.1442 ± 0.0049
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 83050451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 81
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 50
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.19785
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 83050451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-20 07:40:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CANO.HHZ. 2020-09-20T07:34:58.69 3.0 undecidable manual Sg 23.66 0
AC.VLO.HHZ. 2020-09-20T07:34:52.63 3.0 undecidable manual Pn 5.31 0
IV.SERS.HHZ. 2020-09-20T07:34:51.41 3.0 positive manual Pg 11.91 0
IV.PLLN.EHZ. 2020-09-20T07:34:41.60 3.0 negative manual Pn 0.41 0
XK.GIZZ.HHZ. 2020-09-20T07:34:40.02 3.0 undecidable manual Pn 2.69 0
IV.RNI2.HHZ. 2020-09-20T07:34:33.44 3.0 undecidable manual Sg 7.42 0
IV.SACR.HHZ. 2020-09-20T07:34:32.65 3.0 undecidable manual Sn -5.44 0
IV.CERA.HHZ. 2020-09-20T07:34:31.60 3.0 undecidable manual Sg 4.82 0
IV.SPS2.HHZ. 2020-09-20T07:34:29.34 3.0 positive manual Pn -5.15 0
IV.EUCT.HNZ. 2020-09-20T07:34:26.60 3.0 undecidable manual Sn -2.32 0
IV.PZUN.HHZ. 2020-09-20T07:34:26.48 3.0 positive manual Pg 10.22 0
GU.RNCA.HHZ. 2020-09-20T07:34:25.64 3.0 undecidable manual Sn 1.45 0
MN.BNI.HHZ. 2020-09-20T07:34:20.25 3.0 positive manual Pn 3.42 0
IV.NOCI.HHZ. 2020-09-20T07:34:19.97 3.0 positive manual Pn -4.22 0
IV.EUCT.HNZ. 2020-09-20T07:34:08.53 3.0 undecidable manual Pg 12.65 0
IV.VIVA.HHZ. 2020-09-20T07:34:07.71 3.0 undecidable manual Sn -6.67 0
IV.VCEL.EHZ. 2020-09-20T07:34:04.25 3.0 undecidable manual Sn -5.06 0
IV.RIBO.EHZ.01 2020-09-20T07:34:02.15 3.0 undecidable manual Sg 9.91 0
IV.ZONE.HHZ. 2020-09-20T07:33:59.30 3.0 undecidable manual Pg 5 0
TV.SF01.EHZ. 2020-09-20T07:33:51.30 3.0 undecidable manual Sn 2.16 0
IV.MML1.HNN. 2020-09-20T07:33:38.64 0.3 undecidable manual S 320 21.9669 114 0.11 72
IV.NRCA.HHZ. 2020-09-20T07:33:36.38 0.3 undecidable manual S 190 14.3745 125 0.15 72
IV.MMO1.EHZ. 2020-09-20T07:33:36.78 0.3 undecidable manual S 115 16.3725 121 -0.03 74
IV.CSP1.EHZ. 2020-09-20T07:33:36.61 0.3 undecidable manual S 19 15.2736 123 0.11 73
IV.FDMO.HHZ. 2020-09-20T07:33:35.04 0.3 undecidable manual S 331 9.5793 136 0.09 74
IT.MTCL.HGE. 2020-09-20T07:33:35.58 0.1 undecidable manual S 287 12.2766 129 -0.07 98
IV.MML1.HNN. 2020-09-20T07:33:34.18 0.6 undecidable manual P 320 21.9669 114 -0.82 39
IV.FEMA.HNE. 2020-09-20T07:33:34.40 0.1 undecidable manual S 271 7.6812 142 -0.12 98
IV.MC2.EHZ. 2020-09-20T07:33:34.18 0.3 undecidable manual S 147 6.5934 146 -0.13 74
IV.MMO1.EHZ. 2020-09-20T07:33:33.96 0.6 undecidable manual P 115 16.3725 121 -0.05 49
IT.MTCL.HGE. 2020-09-20T07:33:33.41 0.1 undecidable manual P 287 12.2766 129 0.07 99
IV.CSP1.EHZ. 2020-09-20T07:33:33.99 1.0 negative manual P 19 15.2736 123 0.16 24
IV.NRCA.HHZ. 2020-09-20T07:33:33.71 0.1 undecidable manual P 190 14.3745 125 0.04 99
IV.FEMA.HNE. 2020-09-20T07:33:32.92 0.1 undecidable manual P 271 7.6812 142 0.23 96
IV.MC2.EHZ. 2020-09-20T07:33:32.52 0.1 undecidable manual P 147 6.5934 146 -0.04 100
IV.FDMO.HHZ. 2020-09-20T07:33:32.90 1.0 undecidable manual P 331 9.5793 136 -0.03 25
IV.CSNT.HHZ. 2020-09-20T07:33:32.13 3.0 undecidable manual P 4.77 0
IV.MURB.HHZ. 2020-09-20T07:33:25.96 3.0 undecidable manual P 1.19 0
IV.APEC.HHZ. 2020-09-20T07:33:21.34 3.0 undecidable manual P 1.97 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.7 0.000063256555 0.16 AML other m 2020-09-20T07:33:35.31
IV.FDMO.HHN. ML:0.8 0.000074154905 0.1984 AML other m 2020-09-20T07:33:35.18
IV.NRCA.HHE. ML:0.8 0.00006303100500000001 0.0832 AML other m 2020-09-20T07:33:37.16
IV.NRCA.HHN. ML:0.8 0.00006717268000000001 0.1408 AML other m 2020-09-20T07:33:36.60
IV.NRCA.HNE. ML:0.8 0.000065489355 0.1088 AML other m 2020-09-20T07:33:36.91
IV.NRCA.HNN. ML:1.0 0.000104949455 0.7424 AML other m 2020-09-20T07:33:36.24
IV.CSP1.EHE. ML:0.8 0.000058005435 0.2176 AML other m 2020-09-20T07:33:37.50
IV.CSP1.EHN. ML:0.7 0.00005011033 0.2624 AML other m 2020-09-20T07:33:38.47
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download