Earthquake with magnitude of ML 1.8 on date 09-12-2021 and time 06:36:34 (UTC) in region 2 km N Preci (PG)

A magnitude ML 1.8 earthquake occured in region: 2 km N Preci (PG), on

  • 09-12-2021 06:36:34 (UTC)
  • 09-12-2021 07:36:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9, 13.037 at 11 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
Preci PG 2 724 724
Visso MC 6 1107 1831
Sellano PG 9 1079 2910
Castelsantangelo sul Nera MC 10 281 3191
Ussita MC 10 444 3635
Monte Cavallo MC 11 145 3780
Norcia PG 13 4957 8737
Cerreto di Spoleto PG 13 1075 9812
Fiordimonte MC 16 202 10014
Pieve Torina MC 16 1458 11472
Fiastra MC 18 559 12031
Acquacanina MC 18 121 12152
Pievebovigliana MC 19 866 13018
Bolognola MC 19 142 13160

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 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 1.8 2021-12-09
06:36:34
42.9002 13.0373 11 2021-12-09
06:41:27
Sala Sismica INGV-Roma 98338101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-09 06:36:34 ± 0.05
Latitude 42.9002 ± 0.0027
Longitude 13.0373 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98338101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 375
Semi-minor axis of confidence ellipse (meter) 274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 32
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) 0.56747
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 98338101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-09 06:41:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2021-12-09T06:36:54.88 0.6 undecidable manual S 341 0.5675 50 1.3 29
IV.MMUR.HNZ. 2021-12-09T06:36:50.22 3.0 undecidable manual S -3.77 0
IV.SSFR.HHZ. 2021-12-09T06:36:45.80 0.6 undecidable manual P 341 0.5675 50 0.4 42
IV.TERO.HHZ. 2021-12-09T06:36:44.19 1.0 positive manual P 124 0.5 50 -0.06 23
IV.MML1.EHZ. 2021-12-09T06:36:43.00 0.1 undecidable manual S 347 0.2185 50 -0.25 93
IV.EL6.EHZ. 2021-12-09T06:36:43.09 0.3 undecidable manual P 6 0.4317 50 0.01 70
IV.CSP1.EHZ. 2021-12-09T06:36:43.34 0.1 undecidable manual S 33 0.2275 50 -0.18 94
IV.GAVE.EHZ. 2021-12-09T06:36:43.53 0.1 undecidable manual S 207 0.2329 50 -0.15 94
IV.MOMA.HHZ. 2021-12-09T06:36:42.48 1.0 positive manual P 254 0.3552 50 0.69 20
IV.MMO1.EHZ. 2021-12-09T06:36:42.83 0.1 undecidable manual S 90 0.2122 50 -0.23 93
IV.SNTG.HHZ. 2021-12-09T06:36:41.80 0.6 undecidable manual P 349 0.3615 50 -0.09 47
IV.MF5.EHZ. 2021-12-09T06:36:41.71 1.0 positive manual P 74 0.3211 50 0.52 21
IV.SMA1.EHZ. 2021-12-09T06:36:41.63 0.1 undecidable manual P 141 0.3471 50 -0.01 95
IV.MC2.EHZ. 2021-12-09T06:36:40.03 0.1 undecidable manual S 84 0.1115 131 0.14 97
IV.ASSB.HHZ. 2021-12-09T06:36:40.91 0.1 negative manual P 297 0.3112 50 -0.12 94
IV.GUMA.HHZ. 2021-12-09T06:36:40.62 0.1 positive manual P 53 0.2716 50 0.27 91
IV.FDMO.HHZ. 2021-12-09T06:36:40.57 0.1 undecidable manual S 15 0.1412 124 -0.22 95
IV.MTRA.EHZ. 2021-12-09T06:36:40.77 0.6 positive manual P 118 0.2995 50 -0.06 47
IV.CESI.HHZ. 2021-12-09T06:36:40.67 0.1 undecidable manual S 317 0.143 124 -0.18 95
IV.LNSS.HHZ. 2021-12-09T06:36:40.75 0.1 negative manual P 180 0.2968 50 -0.04 95
IV.MMO1.EHZ. 2021-12-09T06:36:39.28 0.1 negative manual P 90 0.2122 50 -0.05 97
IV.MML1.EHZ. 2021-12-09T06:36:39.36 0.6 positive manual P 347 0.2185 50 -0.08 48
IV.NRCA.HHZ. 2021-12-09T06:36:39.06 0.1 undecidable manual S 140 0.0872 138 -0.16 97
IV.CSP1.EHZ. 2021-12-09T06:36:39.55 0.1 positive manual P 33 0.2275 50 -0.04 97
IT.MTCL.HGZ. 2021-12-09T06:36:39.28 0.1 undecidable manual S 343 0.098 134 -0.22 95
IV.GAVE.EHZ. 2021-12-09T06:36:39.72 0.1 positive manual P 207 0.2329 50 0.04 97
IV.FEMA.HNZ. 2021-12-09T06:36:38.66 0.1 undecidable manual S 8 0.063 147 0.03 100
IV.FDMO.HHZ. 2021-12-09T06:36:38.06 0.1 positive manual P 15 0.1412 124 0.04 98
IV.CESI.HHZ. 2021-12-09T06:36:38.17 0.1 negative manual P 317 0.143 124 0.12 97
IT.MTCL.HGZ. 2021-12-09T06:36:37.38 0.3 positive manual P 343 0.098 134 0.11 73
IV.MC2.EHZ. 2021-12-09T06:36:37.71 0.1 negative manual P 84 0.1115 131 0.21 95
IV.FEMA.HNZ. 2021-12-09T06:36:37.02 0.3 undecidable manual P 8 0.063 147 0.25 72
IV.NRCA.HHZ. 2021-12-09T06:36:37.14 1.0 undecidable manual P 140 0.0872 138 0.03 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNE. ML:1.9 0.00116 1.26 AML other m 2021-12-09T06:36:38.29
IV.FEMA.HNN. ML:1.8 0.000917 0.72 AML other m 2021-12-09T06:36:38.58
IV.NRCA.HHN. ML:2.2 0.00191 0.14 AML other m 2021-12-09T06:36:39.20
IV.NRCA.HNN. ML:2.2 0.001815 0.14 AML other m 2021-12-09T06:36:39.20
IT.MTCL.HGN. ML:3.6 0.0434 0.06 AML other m 2021-12-09T06:36:39.36
IV.NRCA.HHE. ML:2 0.001145 0.18 AML other m 2021-12-09T06:36:39.48
IV.NRCA.HNE. ML:1.9 0.001068 0.46 AML other m 2021-12-09T06:36:39.48
IT.MTCL.HGE. ML:3.5 0.03785 0.08 AML other m 2021-12-09T06:36:39.96
IV.FDMO.HHE. ML:1.6 0.0003655 0.46 AML other m 2021-12-09T06:36:40.96
IV.MC2.EHN. ML:2 0.0010765 0.18 AML other m 2021-12-09T06:36:41.15
IV.CESI.HNE. ML:1.6 0.000353 0.52 AML other m 2021-12-09T06:36:41.43
IV.CESI.HHE. ML:1.7 0.0004115 0.52 AML other m 2021-12-09T06:36:41.43
IV.CESI.HHN. ML:1.8 0.0005505 0.24 AML other m 2021-12-09T06:36:41.18
IV.CESI.HNN. ML:1.8 0.0005605 0.22 AML other m 2021-12-09T06:36:41.18
IV.FDMO.HHN. ML:1.5 0.0002835 1.26 AML other m 2021-12-09T06:36:41.31
IV.MC2.EHE. ML:1.8 0.0006135 0.2 AML other m 2021-12-09T06:36:41.29
IV.MMO1.EHN. ML:1.9 0.0004925 0.88 AML other m 2021-12-09T06:36:43.14
IV.MMO1.EHE. ML:1.7 0.000323 0.2 AML other m 2021-12-09T06:36:43.26
IV.MML1.EHN. ML:1.5 0.0001832 0.42 AML other m 2021-12-09T06:36:43.46
IV.MML1.EHE. ML:1.4 0.000155 0.66 AML other m 2021-12-09T06:36:43.52
IV.GAVE.EHE. ML:1.5 0.0001675 0.12 AML other m 2021-12-09T06:36:44.26
IV.GAVE.EHN. ML:1.4 0.00015515 0.98 AML other m 2021-12-09T06:36:44.42
IV.TERO.HHN. ML:1.9 0.000176 0.46 AML other m 2021-12-09T06:36:52.01
IV.TERO.HHE. ML:1.9 0.0001665 0.42 AML other m 2021-12-09T06:36:55.34
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