Earthquake with magnitude of ML 0.1 on date 18-10-2021 and time 15:57:39 (UTC) in region 4 km S Fiordimonte (MC)

A magnitude ML 0.1 earthquake occured in region: 4 km S Fiordimonte (MC), on

  • 18-10-2021 15:57:39 (UTC)
  • 18-10-2021 17:57:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.005, 13.082 at 5 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
Fiordimonte MC 4 202 202
Pieve Torina MC 5 1458 1660
Pievebovigliana MC 7 866 2526
Monte Cavallo MC 7 145 2671
Fiastra MC 7 559 3230
Acquacanina MC 8 121 3351
Visso MC 8 1107 4458
Ussita MC 8 444 4902
Muccia MC 9 915 5817
Bolognola MC 12 142 5959
Serravalle di Chienti MC 13 1070 7029
Castelsantangelo sul Nera MC 14 281 7310
Preci PG 14 724 8034
Camerino MC 15 6974 15008
Sellano PG 18 1079 16087
Sarnano MC 18 3264 19351
Cessapalombo MC 19 512 19863
Sefro MC 19 422 20285
Caldarola MC 19 1823 22108

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Foligno (57155 inhabitants)
57 Km E of Perugia (166134 inhabitants)
61 Km NE of Terni (111501 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
94 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 0.1 2021-10-18
15:57:39
43.0048 13.0818 5 2021-10-18
16:11:39
Sala Sismica INGV-Roma 96731061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 15:57:39 ± 0.02
Latitude 43.0048 ± 0.0000
Longitude 13.0818 ± 0.0012
Depth (km) 5 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96731061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 798
Semi-minor axis of confidence ellipse (meter) 28
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 268
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.02
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.17267
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.1

Field Value
Value 0.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 96731061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 16:11:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.LNT.HGZ. 2021-10-18T15:58:50.54 3.0 undecidable manual Sn 0.85 0
IV.QLNO.HHZ. 2021-10-18T15:58:46.37 3.0 undecidable manual Pg 17.17 0
IT.FIE.HGZ. 2021-10-18T15:58:42.40 3.0 undecidable manual Sn -5.24 0
IV.EVRN.HHZ. 2021-10-18T15:58:39.35 3.0 undecidable manual Sn -0.76 0
IV.ZEN8.EHZ. 2021-10-18T15:58:23.55 3.0 undecidable manual Pn -1.3 0
IV.HVIT.HHZ. 2021-10-18T15:58:13.41 3.0 negative manual Pg 6.4 0
IV.MC2.EHZ. 2021-10-18T15:58:12.16 3.0 undecidable manual Sg 2.88 0
IV.FIR.HHZ. 2021-10-18T15:58:02.48 3.0 undecidable manual Pn 0.69 0
IV.EPOZ.HHZ. 2021-10-18T15:58:01.87 3.0 undecidable manual Pg 3.98 0
IV.RIBO.EHZ.01 2021-10-18T15:58:00.45 3.0 undecidable manual Pg 4.14 0
IV.LAV9.HNZ. 2021-10-18T15:57:51.53 3.0 undecidable manual S -5.38 0
IV.NRCA.HHZ. 2021-10-18T15:57:46.47 0.3 undecidable manual S 172 0.1727 106 0.01 73
IV.MML1.EHZ. 2021-10-18T15:57:45.08 0.6 undecidable manual S 324 0.1349 110 -0.01 49
IV.CSP1.EHZ. 2021-10-18T15:57:44.73 0.3 undecidable manual S 46 0.125 111 0.01 74
IV.NRCA.HHZ. 2021-10-18T15:57:43.53 0.1 undecidable manual P 172 0.1727 106 -0.01 97
IV.CSP1.EHZ. 2021-10-18T15:57:42.47 1.0 undecidable manual P 46 0.125 111 -0.06 24
IV.MML1.EHZ. 2021-10-18T15:57:42.76 0.6 undecidable manual P 324 0.1349 110 0.02 49
IV.FDMO.HHZ. 2021-10-18T15:57:41.78 0.6 undecidable manual S 7 0.0324 147 -0.02 50
IV.FDMO.HHZ. 2021-10-18T15:57:40.86 0.1 undecidable manual P 7 0.0324 147 0.01 100
IV.SPS2.HHZ. 2021-10-18T15:57:39.91 3.0 positive manual Pn -0.68 0
IV.RNI2.HHZ. 2021-10-18T15:57:29.72 3.0 undecidable manual S -2.16 0
IV.IOCA.HHZ. 2021-10-18T15:57:27.51 3.0 undecidable manual S -3.63 0
IV.CMPR.HHZ. 2021-10-18T15:57:20.57 3.0 positive manual P -1.12 0
OT.OT17.EHZ. 2021-10-18T15:57:18.01 3.0 positive manual P -1.26 0
IX.RSF3.HHZ.02 2021-10-18T15:57:16.83 3.0 undecidable manual S -0.1 0
IV.MRLC.HHZ. 2021-10-18T15:57:13.56 3.0 undecidable manual P -3.9 0
IV.VAGA.HHZ. 2021-10-18T15:57:12.70 3.0 undecidable manual P -1.55 0
IV.SGG.HHZ. 2021-10-18T15:57:09.22 3.0 positive manual P -2.81 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0 4.475E-5 0.08 AML other m 2021-10-18T15:57:42.22
IV.FDMO.HHE. ML:0 7.194816E-5 0.128 AML other m 2021-10-18T15:57:42.08
IV.MML1.EHE. ML:0.1 1.744231E-5 0.1152 AML other m 2021-10-18T15:57:45.63
IV.MML1.EHN. ML:0 9.9149605E-6 0.1024 AML other m 2021-10-18T15:57:45.93
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