Earthquake with magnitude of ML 1.3 on date 04-12-2021 and time 09:41:38 (Italy) in region 5 km SE Fiordimonte (MC)

A magnitude ML 1.3 earthquake occured in region: 5 km SE Fiordimonte (MC), on

  • 04-12-2021 08:41:38 (UTC)
  • 04-12-2021 09:41:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.996, 13.121 at 9 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 5 202 202
Fiastra MC 5 559 761
Acquacanina MC 6 121 882
Ussita MC 6 444 1326
Visso MC 8 1107 2433
Pieve Torina MC 8 1458 3891
Pievebovigliana MC 8 866 4757
Bolognola MC 9 142 4899
Monte Cavallo MC 10 145 5044
Muccia MC 12 915 5959
Castelsantangelo sul Nera MC 12 281 6240
Preci PG 15 724 6964
Sarnano MC 15 3264 10228
Serravalle di Chienti MC 16 1070 11298
Camerino MC 16 6974 18272
Cessapalombo MC 17 512 18784
Caldarola MC 18 1823 20607
Montefortino FM 19 1178 21785
Camporotondo di Fiastrone MC 19 563 22348
Amandola FM 19 3629 25977
Gualdo MC 19 815 26792
Sellano PG 20 1079 27871
Montemonaco AP 20 604 28475

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
61 Km E of Perugia (166134 inhabitants)
62 Km NE of Terni (111501 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
76 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
100 Km NW of Montesilvano (53738 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.3 2021-12-04
08:41:38
42.996 13.1212 9 2021-12-04
08:55:34
Sala Sismica INGV-Roma 98119651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-04 08:41:38 ± 0.1
Latitude 42.9960 ± 0.0036
Longitude 13.1212 ± 0.0061
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98119651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 413
Semi-minor axis of confidence ellipse (meter) 368
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.34084
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 98119651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-04 08:55:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHE. 2021-12-04T08:41:51.42 0.1 undecidable manual S 278 0.3408 50 0.05 94
IV.NRCA.HHZ. 2021-12-04T08:41:45.58 0.3 undecidable manual S 182 0.1628 116 0.37 68
IV.CESI.HHZ. 2021-12-04T08:41:45.46 0.3 undecidable manual S 273 0.1583 116 0.39 68
IV.ASSB.HHE. 2021-12-04T08:41:45.51 0.1 undecidable manual P 278 0.3408 50 -0.32 89
IV.MC2.EHZ. 2021-12-04T08:41:43.01 0.3 undecidable manual S 150 0.098 128 -0.08 74
IV.CSP1.EHZ. 2021-12-04T08:41:43.73 0.3 undecidable manual S 33 0.1133 124 0.15 72
IV.NRCA.HHZ. 2021-12-04T08:41:42.17 0.1 undecidable manual P 182 0.1628 116 -0.11 96
IT.MTCL.HGE. 2021-12-04T08:41:42.78 0.3 undecidable manual S 269 0.089 131 -0.05 74
IV.CESI.HHZ. 2021-12-04T08:41:42.35 0.3 undecidable manual P 273 0.1583 116 0.15 72
IV.CSP1.EHZ. 2021-12-04T08:41:41.60 0.3 undecidable manual P 33 0.1133 124 0.27 71
IV.FDMO.HHZ. 2021-12-04T08:41:41.52 0.3 undecidable manual S 329 0.0477 149 -0.26 72
IV.FEMA.HNE. 2021-12-04T08:41:41.82 0.3 undecidable manual S 237 0.0621 141 -0.29 71
IT.MTCL.HGE. 2021-12-04T08:41:41.04 0.3 undecidable manual P 269 0.089 131 0.14 73
IV.FEMA.HNE. 2021-12-04T08:41:40.51 0.1 undecidable manual P 237 0.0621 141 0.02 100
IV.MC2.EHZ. 2021-12-04T08:41:40.97 0.1 undecidable manual P 150 0.098 128 -0.08 98
IV.FDMO.HHZ. 2021-12-04T08:41:40.16 0.1 undecidable manual P 329 0.0477 149 -0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.2 0.000306 1.38 AML other m 2021-12-04T08:41:41.70
IV.FDMO.HHE. ML:1 0.000191 0.12 AML other m 2021-12-04T08:41:42.17
IV.CSP1.EHN. ML:1.6 0.000418 0.6 AML other m 2021-12-04T08:41:44.46
IV.CSP1.EHE. ML:1.4 0.000305 1.44 AML other m 2021-12-04T08:41:44.95
IV.NRCA.HHN. ML:1 9.555E-5 1 AML other m 2021-12-04T08:41:46.60
IV.NRCA.HHE. ML:1.1 0.0001088 1.12 AML other m 2021-12-04T08:41:46.07
IV.GUMA.HHN. ML:1.4 0.0001955 1.02 AML other m 2021-12-04T08:41:50.61
IV.GUMA.HHE. ML:1.4 0.000225 1.38 AML other m 2021-12-04T08:41:52.70
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