Earthquake with magnitude of ML 1.1 on date 27-09-2021 and time 18:40:56 (Italy) in region 3 km SW Fiastra (MC)

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

  • 27-09-2021 16:40:56 (UTC)
  • 27-09-2021 18:40:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.018, 13.124 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
Fiastra MC 3 559 559
Fiordimonte MC 4 202 761
Acquacanina MC 4 121 882
Pievebovigliana MC 6 866 1748
Pieve Torina MC 7 1458 3206
Ussita MC 8 444 3650
Bolognola MC 9 142 3792
Muccia MC 10 915 4707
Visso MC 10 1107 5814
Monte Cavallo MC 10 145 5959
Castelsantangelo sul Nera MC 14 281 6240
Camerino MC 14 6974 13214
Sarnano MC 15 3264 16478
Cessapalombo MC 15 512 16990
Serravalle di Chienti MC 15 1070 18060
Caldarola MC 16 1823 19883
Preci PG 17 724 20607
Camporotondo di Fiastrone MC 17 563 21170
Gualdo MC 18 815 21985
Serrapetrona MC 19 966 22951
San Ginesio MC 19 3498 26449
Belforte del Chienti MC 19 1886 28335
Amandola FM 19 3629 31964
Montefortino FM 20 1178 33142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
61 Km E of Perugia (166134 inhabitants)
62 Km NW of Teramo (54892 inhabitants)
64 Km NE of Terni (111501 inhabitants)
74 Km SW of Ancona (100861 inhabitants)
77 Km N of L'Aquila (69753 inhabitants)
92 Km S of Fano (60888 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 1.1 2021-09-27
16:40:56
43.0182 13.1245 8 2021-09-27
16:51:45
Sala Sismica INGV-Roma 95953041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 16:40:56 ± 0.25
Latitude 43.0182 ± 0.0117
Longitude 13.1245 ± 0.0185
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 95953041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1382
Semi-minor axis of confidence ellipse (meter) 1229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 88
Circular confidence region, given by single value of horizontal uncertainty (meter) 1380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36692
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 95953041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 16:51:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LINA.HHZ. 2021-09-27T16:42:35.60 3.0 positive manual Pn -0.08 0
CR.STON.BHZ. 2021-09-27T16:42:30.08 3.0 undecidable manual Sn -3.19 0
ST.CARE.HNZ. 2021-09-27T16:42:27.10 3.0 undecidable manual Sn -3.61 0
IV.CADC.EHZ. 2021-09-27T16:42:14.48 3.0 undecidable manual Sn -0.71 0
IV.PETRA.HHZ. 2021-09-27T16:42:10.44 3.0 negative manual Pn 0.05 0
IV.BIOG.HHZ. 2021-09-27T16:42:08.07 3.0 undecidable manual Sg 0.94 0
IV.COLB.HHZ. 2021-09-27T16:42:06.36 3.0 undecidable manual Sg 1.97 0
CR.STON.BHZ. 2021-09-27T16:42:01.68 3.0 undecidable manual Pg 14.02 0
OT.OT17.EHZ. 2021-09-27T16:42:01.81 3.0 undecidable manual Sn -0.74 0
IV.IACL.HHZ. 2021-09-27T16:42:00.39 3.0 positive manual Pn -1.28 0
IV.MDI.HHZ. 2021-09-27T16:41:57.87 3.0 negative manual Pg 14.51 0
IV.PZUN.HHZ. 2021-09-27T16:41:54.96 3.0 positive manual Pg 11.65 0
GU.GBOS.HHZ. 2021-09-27T16:41:50.13 3.0 undecidable manual Pn 3.04 0
IV.ZCCA.HHZ. 2021-09-27T16:41:45.38 3.0 undecidable manual Sg 0.22 0
IX.SRN3.HHZ.02 2021-09-27T16:41:45.93 3.0 undecidable manual Pg 3.32 0
MN.TRI.HHZ. 2021-09-27T16:41:43.92 3.0 negative manual Pg 9.71 0
IV.VTIR.HHZ. 2021-09-27T16:41:30.40 3.0 undecidable manual Pn -2.53 0
IT.PLTA.HNZ. 2021-09-27T16:41:20.58 3.0 undecidable manual Pn -3.42 0
IV.PCRO.HNZ. 2021-09-27T16:41:19.90 3.0 undecidable manual S -0.29 0
IV.RM33.EHZ. 2021-09-27T16:41:11.48 3.0 undecidable manual S 0
IV.TERO.HHZ. 2021-09-27T16:41:11.09 3.0 undecidable manual S 0
IV.GAVE.EHZ. 2021-09-27T16:41:10.61 0.6 undecidable manual S 207 0.3669 50 -0.13 49
IV.MTRA.EHZ. 2021-09-27T16:41:08.64 0.3 undecidable manual S 143 0.3283 50 -0.97 57
IV.PESA.HHZ. 2021-09-27T16:41:07.81 3.0 undecidable manual Pn 0.59 0
IV.SMA1.EHZ. 2021-09-27T16:41:07.24 3.0 undecidable manual S 0
IV.TERO.HHZ. 2021-09-27T16:41:06.30 3.0 undecidable manual P -0.67 0
IV.GAVE.EHZ. 2021-09-27T16:41:05.06 0.1 undecidable manual P 207 0.3669 50 0.26 96
IV.RM33.EHZ. 2021-09-27T16:41:05.83 3.0 undecidable manual P 1.24 0
IV.NRCA.HHZ. 2021-09-27T16:41:04.44 0.3 undecidable manual S 182 0.1844 111 0.17 76
IV.MMO1.EHZ. 2021-09-27T16:41:04.14 0.6 undecidable manual S 129 0.1898 110 -0.32 49
IV.MTRA.EHZ. 2021-09-27T16:41:04.99 0.1 undecidable manual P 143 0.3283 50 0.85 80
IV.SMA1.EHZ. 2021-09-27T16:41:03.16 3.0 positive manual P -0.83 0
IV.MF5.EHZ. 2021-09-27T16:41:02.11 0.1 undecidable manual P 97 0.2473 106 -0.27 98
IV.PE3.EHZ. 2021-09-27T16:41:02.42 3.0 positive manual P -0.23 0
IV.CSP1.EHZ. 2021-09-27T16:41:01.49 0.3 undecidable manual S 39 0.0944 126 0.31 75
IV.MMO1.EHZ. 2021-09-27T16:41:01.85 0.3 undecidable manual P 129 0.1898 110 0.69 66
IV.NRCA.HHZ. 2021-09-27T16:41:00.83 0.1 undecidable manual P 182 0.1844 111 -0.23 100
IV.MML1.EHZ. 2021-09-27T16:40:59.42 1.0 undecidable manual P 311 0.1466 115 -0.86 21
IV.CSP1.EHZ. 2021-09-27T16:40:58.94 0.6 negative manual P 39 0.0944 126 -0.34 50
IV.FDMO.HHZ. 2021-09-27T16:40:57.74 1.0 positive manual P 304 0.0324 155 -0.64 23
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.000162120665 0.064 AML other m 2021-09-27T16:41:04.53
IV.NRCA.HHN. ML:1.4 0.0001745 0.08 AML other m 2021-09-27T16:41:04.91
IV.FDMO.HHN. ML:0.4 3.335E-5 0.24 AML other m 2021-09-27T16:41:08.12
IV.FDMO.HHE. ML:0.3 2.775E-5 0.18 AML other m 2021-09-27T16:41:08.24
IV.SMA1.EHE. ML:0.8 2.1093145E-5 0.5376 AML other m 2021-09-27T16:41:06.55
IV.SMA1.EHN. ML:1.1 3.9793385E-5 1.7792 AML other m 2021-09-27T16:41:04.97
IV.RM33.EHE. ML:0.8 1.4207725E-5 0.1792 AML other m 2021-09-27T16:41:12.10
IV.RM33.EHN. ML:1 1.7591325E-5 0.2048 AML other m 2021-09-27T16:41:11.65
IV.TERO.HHE. ML:1.6 8.3438205E-5 1.4976 AML other m 2021-09-27T16:41:11.88
IV.TERO.HHN. ML:0.8 1.586058E-5 1.4976 AML other m 2021-09-27T16:41:12.63
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