Earthquake with magnitude of ML 2.3 on date 27-04-2021 and time 04:48:15 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 2.3 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 27-04-2021 02:48:15 (UTC)
  • 27-04-2021 04:48:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.578, 12.437 at 26 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
63 Km N of Trapani (68759 inhabitants)
87 Km N of Marsala (83194 inhabitants)
96 Km NW of Palermo (674435 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
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
Bulletin
Rev1000
ML 2.3 2021-04-27
02:48:15
38.5785 12.4368 26 2021-07-12
16:55:09
Bollettino Sismico Italiano INGV 89628651
Reviewed
Rev100
ML 2.3 2021-04-27
02:48:13
38.6335 12.329 11 2021-04-27
03:02:48
Sala Sismica INGV-Roma 89512711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-27 02:48:15 ± 0.31
Latitude 38.5785 ± 0.0171
Longitude 12.4368 ± 0.0265
Depth (km) 26 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89628651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1993
Semi-minor axis of confidence ellipse (meter) 1900
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 1990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 3.57121
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 89628651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-12 00:06:05

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 89512711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-27 03:02:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NDIM.HNZ. 2021-04-27T02:50:03.00 3.0 negative manual P 1.335 0
IV.SACR.HHZ. 2021-04-27T02:50:00.55 3.0 undecidable manual Sg 15.91 0
IV.BRSN.EHZ. 2021-04-27T02:49:42.18 3.0 positive manual P 2.14 0
IV.NARO.HHZ. 2021-04-27T02:49:29.29 3.0 negative manual P -1.41 0
IV.MTTG.HHZ. 2021-04-27T02:49:29.86 3.0 undecidable manual Sn -1.72 0
OT.OT13.EHZ. 2021-04-27T02:49:25.87 3.0 positive manual P 3.97 0
OT.OT16.EHZ. 2021-04-27T02:49:21.13 3.0 negative manual P 6.2 0
IV.AGLI.HHZ. 2021-04-27T02:49:11.63 1.0 undecidable manual P 317 3.5712 54 1.69 3
IX.STN3.HNZ.01 2021-04-27T02:49:05.02 3.0 undecidable manual P -0.26 0
IV.VIVA.HHZ. 2021-04-27T02:49:00.91 3.0 negative manual P -4.27 0
MN.VSL.HHZ. 2021-04-27T02:48:56.42 0.3 undecidable manual P 292 2.5451 54 0.66 22
IV.ECTS.HHZ. 2021-04-27T02:48:52.41 1.0 undecidable manual P 107 2.2195 54 1.15 8
IV.MTGR.HHZ. 2021-04-27T02:48:40.20 0.3 undecidable manual S 160 0.7302 102 0.38 68
IV.CSLB.HHZ. 2021-04-27T02:48:39.13 0.6 undecidable manual P 116 1.4245 54 -1.15 28
MN.CLTB.HHN. 2021-04-27T02:48:37.33 1.0 undecidable manual P 148 1.1727 54 0.52 20
IV.SCIAC.HHN. 2021-04-27T02:48:36.85 1.0 undecidable manual P 154 1.1835 54 -0.1 22
IV.USI.HHZ. 2021-04-27T02:48:36.30 0.3 undecidable manual S 77 0.5936 105 0.4 68
IV.LEVAN.EHZ. 2021-04-27T02:48:35.70 0.6 undecidable manual S 187 0.5909 105 -0.12 49
IV.ERC.EHE. 2021-04-27T02:48:35.20 1.0 undecidable manual S 168 0.5531 107 0.46 23
IV.MMGO.HHZ. 2021-04-27T02:48:34.58 0.1 undecidable manual P 155 1.0099 98 0.41 84
IV.SOLUN.HHZ. 2021-04-27T02:48:33.55 0.3 undecidable manual P 119 0.9875 99 -0.24 66
IV.CORL.HHE. 2021-04-27T02:48:33.27 0.6 undecidable manual P 135 0.965 99 -0.15 45
IV.CRJA.HHZ. 2021-04-27T02:48:33.41 1.0 undecidable manual P 150 0.8948 100 1.17 16
IV.MARS.EHE. 2021-04-27T02:48:32.66 1.0 undecidable manual P 173 0.831 100 1.5 13
IV.MPG.HHE. 2021-04-27T02:48:30.61 0.3 undecidable manual P 120 0.8346 100 -0.61 63
IV.MTGR.HHZ. 2021-04-27T02:48:29.70 0.6 undecidable manual P 160 0.7302 102 0.23 46
IV.MBFT.HHZ. 2021-04-27T02:48:29.90 0.1 undecidable manual P 147 0.7509 102 0.09 95
IV.USI.HHZ. 2021-04-27T02:48:27.10 0.1 undecidable manual P 77 0.5936 105 -0.1 100
IV.LEVAN.EHZ. 2021-04-27T02:48:26.61 0.1 undecidable manual P 187 0.5909 105 -0.55 90
IV.ERC.EHE. 2021-04-27T02:48:25.65 0.6 undecidable manual P 168 0.5531 107 -0.88 39
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.USI.HHE. ML:0 0.0013929109 0.2208 AML other m 2021-04-27T02:48:38.17
IV.LEVAN.EHE. ML:0 0.0004615 0.32 AML other m 2021-04-27T02:48:38.34
IV.LEVAN.EHN. ML:0 0.0004290635 0.3008 AML other m 2021-04-27T02:48:38.27
IV.USI.HHN. ML:0 0.00384 0.2 AML other m 2021-04-27T02:48:38.25
IV.MBFT.HHN. ML:0 0.0002291478 0.3392 AML other m 2021-04-27T02:48:44.44
IV.MTGR.HHE. ML:0 0.00016698565 0.3008 AML other m 2021-04-27T02:48:41.02
IV.MBFT.HHE. ML:0 0.00018082295 0.4416 AML other m 2021-04-27T02:48:46.55
IV.MTGR.HHN. ML:0 0.000397 1.68 AML other m 2021-04-27T02:48:42.84
IV.SOLUN.HHN. ML:2.4 0.0002185 0.5 AML other m 2021-04-27T02:48:49.23
IV.CRJA.HHN. ML:2.5 0.00027589625 0.4192 AML other m 2021-04-27T02:48:50.45
IV.MMGO.HHE. ML:2 8.160327E-5 1.6208 AML other m 2021-04-27T02:48:52.93
IV.MMGO.HNE. ML:2 9.110546E-5 1.6096 AML other m 2021-04-27T02:48:52.93
IV.SOLUN.HHE. ML:2.4 0.00019977355 0.72 AML other m 2021-04-27T02:48:55.46
IV.MMGO.HHN. ML:2 9.000443E-5 1.6 AML other m 2021-04-27T02:48:56.05
IV.MMGO.HNN. ML:2.1 0.0001100814 1.5904 AML other m 2021-04-27T02:48:56.85
IV.CRJA.HHE. ML:2.4 0.00027176755 0.96 AML other m 2021-04-27T02:48:57.40
IV.CSLB.HHN. ML:2 4.6748765E-5 1.16 AML other m 2021-04-27T02:49:02.84
IV.CSLB.HHE. ML:1.9 3.612752E-5 1.4608 AML other m 2021-04-27T02:49:10.75
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
Waveforms Seismic signals in miniseed + resp format Download