Earthquake with magnitude of ML 0.4 on date 27-09-2021 and time 13:43:53 (Italy) in region 9 km NW Sellano (PG)

A magnitude ML 0.4 earthquake occured in region: 9 km NW Sellano (PG), on

  • 27-09-2021 11:43:53 (UTC)
  • 27-09-2021 13:43:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.938, 12.843 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
Sellano PG 9 1079 1079
Trevi PG 10 8469 9548
Foligno PG 12 57155 66703
Campello sul Clitunno PG 14 2442 69145
Monte Cavallo MC 14 145 69290
Cerreto di Spoleto PG 15 1075 70365
Spello PG 15 8645 79010
Valtopina PG 15 1398 80408
Montefalco PG 16 5679 86087
Preci PG 17 724 86811
Serravalle di Chienti MC 17 1070 87881
Castel Ritaldi PG 19 3278 91159
Vallo di Nera PG 19 364 91523
Bevagna PG 19 5081 96604
Nocera Umbra PG 20 5839 102443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of Foligno (57155 inhabitants)
41 Km E of Perugia (166134 inhabitants)
45 Km NE of Terni (111501 inhabitants)
77 Km W of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
98 Km SE of Arezzo (99543 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Reviewed
Rev100
ML 0.4 2021-09-27
11:43:53
42.9383 12.843 10 2021-09-27
12:22:15
Sala Sismica INGV-Roma 95946921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 11:43:53 ± 0.1
Latitude 42.9383 ± 0.0099
Longitude 12.8430 ± 0.0061
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 95946921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1065
Semi-minor axis of confidence ellipse (meter) 501
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 348
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30577
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 95946921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 12:22:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
SL.LJU.BHZ. 2021-09-27T11:45:37.42 3.0 undecidable manual Sg 9.81 0
IV.MDI.HHZ. 2021-09-27T11:45:36.23 3.0 undecidable manual Sn 0.95 0
IV.BAG8.EHZ. 2021-09-27T11:45:21.63 3.0 undecidable manual Sn -7.82 0
IV.ZEN8.EHZ. 2021-09-27T11:45:16.74 3.0 undecidable manual Sn -6.57 0
GU.CIRO.HHZ. 2021-09-27T11:45:12.35 3.0 negative manual Pg 12.82 0
MN.TRI.HHZ. 2021-09-27T11:45:06.99 3.0 undecidable manual Sn -9.6 0
GU.LSD.HHZ. 2021-09-27T11:45:06.19 3.0 negative manual Pn 4.37 0
GU.IMI.HHZ. 2021-09-27T11:44:58.12 3.0 undecidable manual Pg 12.71 0
IV.MTGR.HHZ. 2021-09-27T11:44:57.03 3.0 negative manual Pg 5.15 0
IV.FERC.HHZ.00 2021-09-27T11:44:56.49 3.0 undecidable manual Pn 3.19 0
IV.MARS.HNZ. 2021-09-27T11:44:51.37 3.0 undecidable manual Pn -2.54 0
OT.OT05.EHZ. 2021-09-27T11:44:45.39 3.0 undecidable manual Sn 0.03 0
GU.CANO.HHZ. 2021-09-27T11:44:42.45 3.0 positive manual Pn -1.41 0
IV.EUCT.HNZ. 2021-09-27T11:44:42.67 3.0 positive manual Pn -1.74 0
IV.BAG8.EHZ. 2021-09-27T11:44:40.28 3.0 undecidable manual Pn -2.99 0
IV.RIBO.EHZ.01 2021-09-27T11:44:33.86 3.0 undecidable manual Sg 1.45 0
IV.ZCCA.HHZ. 2021-09-27T11:44:30.25 3.0 undecidable manual Pg 6.63 0
IV.TST02.HHZ. 2021-09-27T11:44:25.70 3.0 undecidable manual Sg 4 0
IX.SCL3.EHZ.02 2021-09-27T11:44:24.46 3.0 undecidable manual Pn -0.43 0
GU.POPM.HHZ. 2021-09-27T11:44:23.71 3.0 negative manual Pg 1.78 0
IX.RSF3.HHZ.02 2021-09-27T11:44:16.03 3.0 negative manual Pn -3.79 0
IT.SULP.HGZ. 2021-09-27T11:44:11.31 3.0 undecidable manual Sg 0.4 0
IV.SNTG.HHZ. 2021-09-27T11:44:04.32 3.0 undecidable manual P 0
IV.CSP1.EHZ. 2021-09-27T11:44:04.71 0.6 undecidable manual S 60 0.3058 50 -0.06 50
IV.MC2.EHN. 2021-09-27T11:44:03.69 0.6 undecidable manual S 96 0.2545 50 0.44 47
IV.RNI2.HHZ. 2021-09-27T11:44:03.92 3.0 undecidable manual Pn -1.26 0
IV.NRCA.HHE. 2021-09-27T11:44:02.13 0.6 undecidable manual S 118 0.2248 50 -0.23 49
IV.MML1.EHZ. 2021-09-27T11:44:01.02 0.6 undecidable manual S 28 0.1988 115 -0.43 47
IV.FDMO.HHZ. 2021-09-27T11:44:01.34 0.6 undecidable manual S 61 0.2041 114 -0.29 49
IV.ASSB.HHZ. 2021-09-27T11:44:00.62 0.6 undecidable manual S 308 0.17 118 0.15 51
IV.CSP1.EHZ. 2021-09-27T11:43:59.90 1.0 negative manual P 60 0.3058 50 0.09 25
IV.MC2.EHN. 2021-09-27T11:43:59.24 0.1 undecidable manual P 96 0.2545 50 0.3 96
IV.LAV9.HHZ. 2021-09-27T11:43:58.21 3.0 positive manual P -0.98 0
IV.NRCA.HHE. 2021-09-27T11:43:58.26 0.1 undecidable manual P 118 0.2248 50 -0.16 100
IV.MOMA.HNN. 2021-09-27T11:43:58.45 0.1 undecidable manual P 236 0.241 50 -0.25 98
IV.FDMO.HHZ. 2021-09-27T11:43:58.05 0.6 negative manual P 61 0.2041 114 0.05 51
IV.CESI.HHZ. 2021-09-27T11:43:57.71 0.6 undecidable manual S 34 0.08 139 0 53
IV.MML1.EHZ. 2021-09-27T11:43:57.84 0.6 positive manual P 28 0.1988 115 -0.05 51
IV.ASSB.HHZ. 2021-09-27T11:43:57.46 0.6 negative manual P 308 0.17 118 0.13 51
IV.VIVA.HHZ. 2021-09-27T11:43:57.75 3.0 positive manual P 0.12 0
IV.CESI.HHZ. 2021-09-27T11:43:56.03 0.3 positive manual P 34 0.08 139 0.3 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.0003445 0.18 AML other m 2021-09-27T11:43:57.82
IV.CESI.HHE. ML:1.3 0.000265 0.18 AML other m 2021-09-27T11:43:57.79
IV.VIVA.HHE. ML:3 0.0006615 0.14 AML other m 2021-09-27T11:43:59.56
IV.VIVA.HHN. ML:2.9 0.0005895 0.24 AML other m 2021-09-27T11:44:02.28
IV.ASSB.HHE. ML:0.3 1.6033683E-5 0.0768 AML other m 2021-09-27T11:44:02.13
IV.ASSB.HHN. ML:0.3 1.53324935E-5 0.1408 AML other m 2021-09-27T11:44:01.48
IV.MML1.EHE. ML:0.5 2.089961E-5 1.7792 AML other m 2021-09-27T11:44:01.59
IV.MML1.EHN. ML:0.4 1.443059E-5 0.1408 AML other m 2021-09-27T11:44:02.34
IV.FDMO.HHE. ML:0.4 1.6907205E-5 0.096 AML other m 2021-09-27T11:44:02.00
IV.FDMO.HHN. ML:0.4 1.3485805E-5 0.3392 AML other m 2021-09-27T11:44:01.34
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