Earthquake with magnitude of ML 0.9 on date 22-12-2021 and time 02:11:04 (UTC) in region 2 km E Gualdo (MC)

A magnitude ML 0.9 earthquake occured in region: 2 km E Gualdo (MC), on

  • 22-12-2021 02:11:04 (UTC)
  • 22-12-2021 03:11:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0600, 13.3620 at 23 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
Gualdo MC 2 815 815
Penna San Giovanni MC 5 1108 1923
Sant'Angelo in Pontano MC 5 1436 3359
Sarnano MC 6 3264 6623
San Ginesio MC 7 3498 10121
Monte San Martino MC 7 765 10886
Amandola FM 9 3629 14515
Smerillo FM 9 365 14880
Ripe San Ginesio MC 9 852 15732
Cessapalombo MC 10 512 16244
Falerone FM 11 3337 19581
Servigliano FM 11 2336 21917
Camporotondo di Fiastrone MC 11 563 22480
Montefalcone Appennino FM 11 424 22904
Colmurano MC 12 1263 24167
Santa Vittoria in Matenano FM 12 1330 25497
Comunanza AP 12 3166 28663
Monte Vidon Corrado FM 12 731 29394
Montappone FM 12 1682 31076
Loro Piceno MC 13 2401 33477
Bolognola MC 13 142 33619
Montefortino FM 13 1178 34797
Monteleone di Fermo FM 14 395 35192
Massa Fermana FM 14 963 36155
Caldarola MC 14 1823 37978
Belmonte Piceno FM 15 646 38624
Montelparo FM 15 778 39402
Force AP 15 1354 40756
Belforte del Chienti MC 15 1886 42642
Urbisaglia MC 15 2628 45270
Acquacanina MC 16 121 45391
Monsampietro Morico FM 16 659 46050
Montegiorgio FM 16 6851 52901
Fiastra MC 17 559 53460
Mogliano MC 17 4696 58156
Tolentino MC 18 20069 78225
Montemonaco AP 18 604 78829
Monte Rinaldo FM 18 379 79208
Montottone FM 18 979 80187
Serrapetrona MC 19 966 81153
Palmiano AP 19 196 81349
Petriolo MC 20 1998 83347
Rotella AP 20 906 84253

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km NW of Teramo (54892 inhabitants)
55 Km E of Foligno (57155 inhabitants)
63 Km S of Ancona (100861 inhabitants)
79 Km N of L'Aquila (69753 inhabitants)
79 Km E of Perugia (166134 inhabitants)
80 Km NE of Terni (111501 inhabitants)
88 Km NW of Montesilvano (53738 inhabitants)
92 Km SE of Fano (60888 inhabitants)
96 Km NW of Pescara (121014 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-12-22
02:11:04
43.0597 13.3617 23 2021-12-22
02:35:27
Sala Sismica INGV-Roma 98803311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-22 02:11:04 ± 0.14
Latitude 43.0597 ± 0.0036
Longitude 13.3617 ± 0.0062
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98803311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 469
Semi-minor axis of confidence ellipse (meter) 127
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.04587
Epicentral distance of station farthest from the epicenter (degree) 0.33815
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98803311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-22 02:35:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CING.HNZ. 2021-12-22T02:11:17.43 0.3 undecidable manual S 339 0.3381 114 0.22 71
IV.NRCA.HHZ. 2021-12-22T02:11:16.12 0.3 undecidable manual S 219 0.2896 118 0.21 69
IV.MNTT.EHZ. 2021-12-22T02:11:13.53 0.3 undecidable manual S 89 0.1709 135 0.46 68
IV.MC2.EHZ. 2021-12-22T02:11:13.95 0.3 undecidable manual S 220 0.1943 131 0.37 69
IV.FDMO.HHZ. 2021-12-22T02:11:13.92 0.3 undecidable manual S 263 0.2014 130 0.18 72
IV.PF6.EHZ. 2021-12-22T02:11:12.40 0.3 undecidable manual S 303 0.1448 140 -0.15 72
IV.CSP1.EHZ. 2021-12-22T02:11:12.11 0.3 undecidable manual S 286 0.1187 146 0.03 76
IV.MMO1.EHZ. 2021-12-22T02:11:12.67 0.3 undecidable manual S 189 0.1619 137 -0.22 73
IV.MF5.EHZ. 2021-12-22T02:11:11.77 0.3 undecidable manual S 135 0.1016 150 -0.04 76
IV.CING.HNZ. 2021-12-22T02:11:11.70 0.3 undecidable manual P 339 0.3381 114 0.06 72
IV.NRCA.HHZ. 2021-12-22T02:11:10.91 0.1 undecidable manual P 219 0.2896 118 0.01 97
IV.SAP2.EHZ. 2021-12-22T02:11:10.94 0.3 undecidable manual S 37 0.0459 166 -0.25 72
IV.MNTT.EHZ. 2021-12-22T02:11:09.26 0.1 undecidable manual P 89 0.1709 135 0 100
IV.MC2.EHZ. 2021-12-22T02:11:09.63 0.1 undecidable manual P 220 0.1943 131 0.08 97
IV.FDMO.HHZ. 2021-12-22T02:11:09.64 0.1 undecidable manual P 263 0.2014 130 0 99
IV.MMO1.EHZ. 2021-12-22T02:11:08.87 0.1 undecidable manual P 189 0.1619 137 -0.28 95
IV.PF6.EHZ. 2021-12-22T02:11:08.75 0.1 undecidable manual P 303 0.1448 140 -0.2 96
IV.MF5.EHZ. 2021-12-22T02:11:08.42 0.1 undecidable manual P 135 0.1016 150 -0.11 99
IV.SAP2.EHZ. 2021-12-22T02:11:08.22 0.6 undecidable manual P 37 0.0459 166 0.05 51
IV.CSP1.EHZ. 2021-12-22T02:11:08.60 0.1 undecidable manual P 286 0.1187 146 -0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.0 0.000041599999999999995 0.14 AML other m 2021-12-22T02:11:16.36
IV.NRCA.HHE. ML:1.1 0.000044192865 0.0992 AML other m 2021-12-22T02:11:16.94
IV.MF5.EHE. ML:0.8 0.000043445525 0.1392 AML other m 2021-12-22T02:11:11.88
IV.MF5.EHN. ML:0.6 0.000025818775 0.0816 AML other m 2021-12-22T02:11:11.92
IV.CSP1.EHE. ML:0.9 0.0000455650085 0.0784 AML other m 2021-12-22T02:11:12.28
IV.CSP1.EHN. ML:1.1 0.000072275275 0.0992 AML other m 2021-12-22T02:11:12.24
IV.MMO1.EHE. ML:0.3 0.0000103172665 0.0608 AML other m 2021-12-22T02:11:12.80
IV.MMO1.EHN. ML:0.4 0.000015361824999999998 0.1808 AML other m 2021-12-22T02:11:13.41
IV.MNTT.EHE. ML:1.5 0.000148320975 0.7008 AML other m 2021-12-22T02:11:13.82
IV.MNTT.EHN. ML:1.4 0.00012464113 0.16 AML other m 2021-12-22T02:11:13.74
IV.MC2.EHE. ML:1.1 0.00006340087710000001 0.16 AML other m 2021-12-22T02:11:14.10
IV.MC2.EHN. ML:1.0 0.000056753970000000004 0.2 AML other m 2021-12-22T02:11:14.78
IV.FDMO.HHE. ML:0.8 0.00003072669 0.1808 AML other m 2021-12-22T02:11:14.20
IV.FDMO.HHN. ML:0.3 0.000011845813 0.1808 AML other m 2021-12-22T02:11:14.24
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download